A/B testing
Comparing two versions by randomly assigning participants and measuring a predefined outcome.
Illustrative example
Test two offer explanations against qualified inquiries.
100 terms · Plain-language definitions
By Jay Mandel · Updated October 1, 2026
A plain-language guide to marketing measurement, data practices, and consumer trust, with definitions that can be read independently.
All examples are illustrative, not verified client results. Working definitions and accountability lenses describe practical uses of a term; they are not claims of a universal standard or original coinage.
Comparing two versions by randomly assigning participants and measuring a predefined outcome.
Test two offer explanations against qualified inquiries.
Rules and technical measures restricting who can use information or systems.
Only the assigned support team can open customer records.
The person responsible for carrying an agreed outcome through delivery.
One owner follows a complaint across departments.
Clear information about material AI involvement in a service or communication.
Tell customers when they are speaking with an automated assistant.
Transforming data so people are not reasonably identifiable in its context of use.
Assess re-identification risk before publishing a research dataset.
Assigning credit for an outcome to observed touchpoints using a stated rule or model.
A last-click report credits search even though other channels influenced the decision.
A record of actions that supports review of what happened.
Log who changed a permission setting and when.
Attracting people with an appealing offer that the seller does not genuinely intend to provide, then steering them toward a different offer. A clearly disclosed introductory price is not, by itself, bait and switch; the issue is a misleading offer or substitution.
A retailer advertises a low-priced product to bring shoppers in, refuses to sell that advertised product, and pressures them to buy a more expensive alternative instead.
The starting reference against which change is assessed.
Record inquiry quality before rewriting the landing page.
The accumulated relationship cost of tactics that manipulate people rather than help them make informed choices. A short-term gain in compliance can create resentment, complaints, and weaker loyalty over time.
A subscription business makes cancellation deliberately difficult. Churn appears lower in the short term, while frustrated customers complain and become less willing to recommend it.
The likelihood a brand comes to mind in a relevant buying situation.
Ask which provider people think of when service fails.
Extra effort that obstructs leaving or stopping payment.
An online signup requires a phone call to cancel.
A situation or need that prompts someone to consider a product category.
Moving offices prompts a search for connectivity providers.
A relationship in which changing one factor produces a change in another.
A controlled test estimates the effect of removing a fee.
The loss of customers or recurring revenue over a defined period.
Distinguish canceled accounts from revenue lost through downgrades.
Evidence supporting an objective claim before it is communicated.
Verify a performance claim under the conditions stated in the ad.
Clean data combines quality with responsible use: accurate and verified where possible, collected for a clear purpose, used with appropriate permission, and maintained over time. Personal information is protected, and anonymous information is used where appropriate. A smaller, reliable audience can be more useful than a large list of suspect contacts.
An assessment lets people voluntarily share preferences for a personalized recommendation. The company records the stated purpose and permission, checks the records, and keeps them current.
The principle that organizations should verify data quality, establish permission and purpose, and maintain the information used for decisions. Unverified records, decaying contacts, and bot-inflated activity are infrastructure problems that require better systems and ownership.
A company discovers duplicate contacts, obsolete job titles, and records with no clear source or permission history in its CRM. It fixes the collection and maintenance process before launching the next campaign.
Comparing groups sharing a starting event over equivalent time periods.
Compare March and April signups at the same age.
Responsibility for resolving a complaint across internal handoffs.
A representative stays accountable when billing needs to intervene.
A range expressing uncertainty in an estimate under a statistical procedure.
Report estimated lift with its interval rather than one precise number.
Favoring evidence that supports an existing belief.
A team reads compliments but ignores cancellation feedback.
The design of how an organization requests, records, honors, and updates people’s permission to use data. In a consent-based process, choices should be understandable, specific, and easy to withdraw. Clear explanations at collection need to connect to the systems that control how information is used.
An email sign-up explains what will be sent and how the information will be used. The company records the choice, timestamp, and wording shown at signup, provides an easy unsubscribe route, and ensures that withdrawal reaches the mailing system.
A usable way to reverse a previously given permission.
Provide a working unsubscribe without requiring login.
Information about the origin and editing history of content.
Retain the creator and modification record for an image.
Revenue remaining after specified variable costs.
Subtract delivery and payment costs before evaluating a promotion.
The share of eligible visits or people completing a defined action.
Divide completed bookings by eligible visitors using the same period.
A statistical association that does not by itself establish cause.
Sales and ad spend rise together during a holiday.
The stated costs of acquiring customers divided by customers acquired.
Include sales effort when reporting a fully loaded acquisition cost.
A person’s ability to make meaningful choices without coercion.
Offer a clear way to decline personalization.
The work a person must do to get an outcome from a service.
Count transfers and repeated explanations when reviewing support.
An estimate of customer value over a relationship using explicit assumptions.
Model retention and contribution margin rather than treating revenue as profit.
Interface choices that steer people into actions they would not knowingly choose.
A preselected add-on increases the price without a clear choice.
Over-reliance on measurement tools as a substitute for strategic judgment. When teams optimize the most visible numbers without testing their meaning, the dashboard can improve while business or customer outcomes stagnate.
A team adjusts spending in response to hourly click-through-rate changes but never asks whether the campaign reaches the right people or helps them make a useful decision.
How closely information reflects the person or event it describes.
Correct an outdated employer before using a job-title segment.
A person’s practical ability to understand and influence uses of information about them.
Let a customer inspect and correct their preferences.
The presence of information required for a specified use.
A lead lacks the permission source needed for an email campaign.
How recently information was verified relative to its intended use.
Recheck purchasing authority before a renewal conversation.
The path data takes through transformations and systems.
Trace a dashboard total back through imports and deduplication.
Collecting and retaining only information needed for a stated purpose.
A booking form does not request a birth date it never uses.
The record of where information came from and how it was produced.
Keep the original source and collection date beside a contact record.
Explicit authority to make a particular decision.
Name who can approve a refund without another escalation.
Identifying and resolving records representing the same entity.
Merge duplicate accounts while preserving source history.
In data-quality work, dirty data is inaccurate, incomplete, duplicated, inconsistent, or outdated. Responsible data use also requires an established source, permitted uses, and permission history. Poor quality and unclear permission create different problems, and both deserve attention.
A sales team buys a contact list with duplicate records, invalid addresses, and outdated job titles. The list also lacks a clear permission history, so the team cannot assume it is suitable for a campaign.
Revealing additional charges after an attractive initial price has drawn a buyer in.
A ticket’s mandatory fees appear only near payment.
Motivations such as safety, belonging, or autonomy that influence choices in context.
Two buyers of the same product may want reassurance and independence.
The degree to which a message or experience connects with a relevant emotional need.
Test reassurance against status language with the intended audience.
Growth that prioritizes short-term value taken from customers, employees, or data without a fair reciprocal exchange. It treats people primarily as inputs to revenue rather than participants in an ongoing relationship.
A platform monetizes detailed user behavior while giving people little understanding of the exchange or meaningful control over how their information is used.
Manufactured scarcity or time pressure that misrepresents a buyer’s actual choices. It pushes a quick decision through a deadline or shortage that is not genuine and can undermine trust in future offers.
A store displays “Only three left” despite having ample stock, or restarts the same supposedly final countdown every time a customer returns.
Information an organization obtains through its direct interactions with people.
A customer submits an order to the store they buy from.
A critical label for business practices that rely on manipulation, opaque terms, or unnecessary friction to extract value. It asks whether the customer receives genuine value and can make a clear, informed choice.
A subscription is easy to start but deliberately difficult to cancel, while unavoidable charges only appear at the final checkout step.
A comparable group deliberately excluded from an intervention to estimate its effect.
Keep a random customer group out of a discount campaign.
People with authority and information review consequential automated decisions.
A reviewer can reject an AI-generated exclusion recommendation.
Connecting records believed to refer to the same person or organization.
Validate a match before joining an anonymous visit to a customer profile.
Treating impression volume as proof of unique reach, attention, engagement, or revenue. Viewability measures an opportunity to see an ad; it does not establish attention or business impact.
A brand reports record impressions while sales decline. The delivery count is real, but it does not show how many people paid attention or what the advertising contributed.
When incentives reward the appearance of performance at the expense of actual performance. Teams learn to optimize whatever the compensation plan or scorecard rewards, even when that behavior weakens the underlying business goal.
A marketing team rewarded for marketing-qualified lead volume lowers its qualification threshold. The lead count rises while the share of leads becoming customers falls.
The additional outcome caused by an activity compared with what would have happened without it.
Compare purchases in a randomized campaign group with an untreated group.
Information estimated from other signals rather than supplied or directly observed.
An age band guessed from browsing can be wrong.
A freely made choice based on understandable information about the proposed use.
Explain partner sharing before asking a person to opt in.
A measure of an outcome after it has occurred.
Annual customer retention reflects earlier experiences.
A measure that may signal a later outcome and needs validation.
Check if product activation predicts renewal in your own records.
Marketing accountability means respecting customers, delivering value consistently, and explaining marketing decisions with credible evidence. It connects investment and claims to business outcomes while being candid about attribution limits.
A VP of Marketing connects brand investment to pipeline and closed revenue where the evidence supports it, explains what cannot be attributed confidently, and looks beyond impressions and click-through rates.
Estimating contributions of marketing and other factors from aggregate results over time.
A model includes price changes and seasonality alongside media spending.
Information presented clearly enough and early enough to affect a choice.
Explain who provides the service before a buyer submits a referral form.
Changes that reduce how well a model fits current conditions.
A scoring model trained on last year’s buyers fails on a new segment.
The value of the best alternative forgone by a decision.
A campaign consumes staff time that could repair onboarding.
The time required to recover an investment through its returns.
Estimate how many months of customer margin repay acquisition spending.
Marketing that presents the appearance of progress, authenticity, or responsibility without the operating behavior to support it. Strong campaign results do not establish that a company is keeping the promise behind its message.
A brand promotes substantial sustainability progress but cannot provide evidence of the operational changes behind that claim. The campaign draws attention, but its central promise remains unsupported.
A retained account of the scope, source, and timing of a permission.
Store the exact opt-in wording with its timestamp.
How well opportunities match buyer needs, fit criteria, and realistic progress.
Review stalled opportunities instead of celebrating their total value.
The role an offer seeks to occupy for a particular audience relative to alternatives.
Explain why a small business would choose your service over doing nothing.
The distance between a stated commitment and the experience delivered.
A support promise says one owner while customers repeat their case.
Replacing direct identifiers with a code while allowing linkage through separately held information.
Keep the lookup key outside the analyst’s dataset.
Grouping people by motivations, attitudes, or values rather than demographics alone.
Compare people seeking control with people seeking belonging.
Restricting information use to defined and appropriate purposes.
A support email is not automatically permission for marketing.
An inquiry meeting explicit criteria for fit and readiness.
An email address alone does not qualify an executive-search buyer.
The share of a defined customer cohort remaining active after a period.
Track first-year renewals separately from long-standing accounts.
Rules defining how long different information is kept and when it is removed.
Delete obsolete prospect records after the agreed period.
Revenue attributed to advertising divided by advertising spend.
A high reported ROAS may exclude returns and organic sales.
The number of observations used in an analysis.
Twenty replies may be too few to compare several customer segments.
Another organization’s first-party data shared through a direct arrangement.
A partner shares a permissioned dataset under a specific agreement.
Distortion caused by the way people or records enter a sample.
A survey of newsletter fans cannot represent all former customers.
Information whose misuse could cause heightened harm or requires special handling.
Limit access to health information collected for support.
The actions taken to repair a failed experience and address its effects.
Restore access, explain the cause, and review compensation.
AI tools used outside an organization’s approved processes and oversight.
A staff member uploads client files to an unapproved assistant.
Technology used outside established organizational oversight.
A team creates a spreadsheet service without access review.
Reducing a product’s size or quantity without a corresponding price reduction, so the customer pays more per unit. Reducing quality is a related but different practice. Whether the change is communicated clearly is a separate accountability question.
A package falls from 500 grams to 450 grams at the same shelf price. A shopper who compares the price per gram can see the increase, even if the packaging looks familiar.
A tension between funding relationships and independent judgment.
An event must explain how it reviews a sponsor it also critiques.
The probability that a test detects an effect of a specified size when it exists.
Plan enough participants before testing a small conversion change.
A business environment in which tracking, profiling, and monetizing people’s behavior become central sources of value. It raises questions about meaningful choice, transparency, and the value people receive for their information.
Someone downloads a free app and later discovers that its location data supports advertising profiles across other services. The collection was buried in terms they did not understand.
Drawing conclusions only from cases that remain visible while ignoring those that disappeared.
Study failed campaigns alongside award winners.
Artificial records generated to resemble selected properties of real data.
Use simulated records for a demo without claiming they are customer evidence.
The pattern of choosing familiar campaign structures and best practices before understanding the problem. Templates can organize work, but they cannot replace original thinking about a specific buyer, situation, and goal.
A team uses the same intake document for every launch. It asks for a target persona, budget, and timeline, but never asks what the buyer is trying to solve.
Information obtained from parties outside the direct relationship with the person.
A broker sells audience records collected from multiple sources.
The accumulated cost of practices that erode customer confidence over time. Repeated gaps between a promise and an experience can make future claims harder to believe, relationships harder to sustain, and trust more costly to rebuild.
A brand runs countdown timers that repeatedly reset. Customers learn to ignore them. When a genuinely time-limited offer arrives, those customers have little reason to believe it.
Evidence and action that rebuild confidence after a failure.
Correct a claim and publish a remedy people can use.
A specific account of the useful outcome an offer provides and why it is credible.
State the problem solved, the benefit, and supporting evidence.
Numbers that look impressive but offer little evidence of progress toward a stated business or customer goal. Raw impressions, lead volume, and follower counts can become vanity metrics when reported without quality, context, or a connection to outcomes.
A campaign generates two million impressions but no qualified pipeline. The dashboard is green. The team still cannot explain what changed for the business.
Evaluating a supplier’s practices and fitness before relying on it.
Check a research vendor’s sources, permissions, and sample controls.
Information someone intentionally shares with a brand, such as preferences, goals, or purchase plans. These are stated signals; they still need context and may change over time.
A quiz asks someone about their goals and preferences. They knowingly provide answers in exchange for a personalized recommendation, with a clear explanation of how the answers will be used.
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