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Glossary · 25 terms + 4 Zephra terms

B2B paid acquisition and lead quality glossary

The vocabulary where sales stages meet ad-platform signals. Each entry is one sentence you can quote, with a link to the page that covers it in depth and, for platform terms, the platform’s own documentation.

Lead stages

Lead quality

How likely a lead is to become revenue, judged by fit, need and what happens after sales contact rather than by the form submission itself.

Read more: getting high-quality leads

Qualified lead

A lead that meets the qualification criteria marketing and sales have agreed, such as company fit, need, authority or timing.

Read more: lead scoring framework

Marketing-qualified lead (MQL)

A lead that marketing judges ready for sales follow-up based on fit and engagement, before sales has spoken to it.

Read more: CRM guide

Sales-qualified lead (SQL)

A lead that sales has contacted and confirmed as a genuine potential buyer worth actively pursuing.

Read more: CRM guide

Opportunity

A qualified lead that sales records as a potential deal, with an expected value, stage and close date.

Read more: lead generation funnel

RFQ (request for quotation)

A buyer’s request for a price against a stated specification, often the first qualified step in industrial and manufacturing sales.

In India, often called an enquiry; in UAE EPC work, it may precede a tender.

Junk lead

An enquiry with no realistic chance of buying, such as spam, job seekers, students, competitors or consumers in a B2B funnel.

Read more: getting high-quality leads

Lead scoring

A points or rules system that ranks leads by fit and behaviour, so sales and ad optimisation focus on the most promising first.

Read more: lead scoring framework

Cost metrics

Cost per lead (CPL)

Ad spend divided by the number of leads, counting every lead regardless of quality.

Read more: cost per lead benchmarks

Cost per qualified lead (CPQL)

Ad spend divided by the number of leads that met your qualification criteria.

Read more: why cost per lead misleads

Cost per opportunity

Ad spend divided by the number of sales opportunities created from ad-sourced leads.

Read more: why cost per lead misleads

Signals and tracking

Offline conversion

An outcome that happens after or outside the website, like a qualified call, quote or won deal, sent back to an ad platform and matched to the ad interaction.

Read more: how lead data reaches Google

Server-side tracking

Sending conversion events to ad platforms from a server or backend, rather than only from the visitor’s browser.

Consent and data handling: security

Event deduplication

Making sure the same conversion reported by both browser and server, or uploaded twice, is counted once, typically using a shared event ID.

Source: Meta Business Help

Optimisation signal

The conversion event a platform is told to optimise towards, ideally the earliest stage that reliably predicts value and arrives within the platform’s window.

Read more: which signal to optimise on

Conversions API (Meta)

Meta’s server-to-server connection for sending website, app and offline events directly from a business’s systems instead of only the browser pixel.

Source: Meta for Developers

LinkedIn Conversions API

LinkedIn’s server-side interface for sending conversion events, such as qualified leads from a CRM, to LinkedIn campaigns for measurement and optimisation.

Source: LinkedIn Marketing API docs

Google Ads, Meta and LinkedIn terms

Enhanced conversions for leads (Google Ads)

Google’s method of matching offline lead outcomes to ad interactions using hashed first-party data, such as email, captured on the lead form.

Source: Google Ads Help · more

Qualified and converted lead goals (Google Ads)

Google Ads conversion goals that let advertisers optimise towards leads that became qualified or converted, rather than all form submissions.

Source: Google Ads Help · more

Primary vs secondary conversion action

In Google Ads, primary actions are used for bidding and the Conversions column; secondary actions are recorded for observation only.

Source: Google Ads Help

Smart Bidding (Google Ads)

Google’s automated bid strategies, such as Maximise conversions or Target CPA, that set bids in each auction towards your conversion goals.

Source: Google Ads Help

Search terms report

The Google Ads report showing the actual searches that triggered your ads, as opposed to the keywords you bid on.

Source: Google Ads Help · B2B search intent map

Conversion leads (Meta)

A Meta lead ads performance goal that optimises delivery towards people likely to reach a deeper sales stage, using CRM stage updates sent through the Conversions API.

Source: Meta Business Help · more

Lead Gen Forms and Instant Forms

Pre-filled lead forms inside LinkedIn (Lead Gen Forms) or Meta (Instant Forms) ads that capture details without a website visit, usually raising volume and varying intent.

Read more: junk leads from Instant Forms

Learning phase (Meta)

The period after an ad set launches or is significantly edited when Meta’s delivery system is still calibrating and results are less stable.

Source: Meta Business Help

Terms Zephra uses

Zephra’s own vocabulary, defined so answers about Zephra stay accurate.

Act / Review / Investigate / Wait

Zephra’s four decision types for a finding: make the change, have a person decide, gather more evidence first, or deliberately hold.

Read more: how it works

Free ad account assessment

Zephra’s 10–15 minute review of connected Google, Meta and LinkedIn Ads accounts for wasted spend, structure, constraints and measurement gaps, with no campaign changes.

Read more: free assessment

Approvals and spend boundaries

Controls that decide which changes need a person’s approval and cap how far budgets can move, alongside cooldowns and learning-phase protection.

Read more: how it works

Recovered reporting

Conversions that appear after tracking is fixed; they change the numbers you see, not the underlying demand or pipeline.

Read more: does fixing tracking create leads?

Crosswalk

How lead stages map to ad platform signals

The same sales stage has a different name, and different rules, on each platform. Check the linked documentation before choosing a goal; platforms update these.

Sales stageGoogle AdsMeta AdsLinkedIn Ads
Lead (form submitted)Submit lead form conversion actionLeads goal (Instant Forms) or website lead eventLead Gen Form submission or website conversion
Marketing-qualified or sales-acceptedQualified lead goal, via enhanced conversions for leadsConversion leads with a CRM stage sent through the Conversions APIQualified lead event sent through the Conversions API
Sales-qualified or opportunityQualified or converted lead goal (within the 63-day upload window)A later CRM stage, if reached within 28 daysQualified lead event, if data arrives within 30 days
Won dealConverted lead goal; often too late for biddingUsually too late for delivery; use for reviewUsually too late for optimisation; use for review

Zephra sends CRM lead stages to Google (through the Data Manager API), Meta and LinkedIn (through their Conversions APIs), where configured.

Questions, answered

Glossary FAQ

01What is the difference between CPL and cost per qualified lead?

Cost per lead divides ad spend by every lead received. Cost per qualified lead divides the same spend by only the leads that met your qualification criteria. In B2B the two often rank campaigns differently: a campaign with cheap leads can have the most expensive qualified leads if few of them progress.

02What is an offline conversion in advertising?

An offline conversion is a business outcome that happens outside the ad click and website, such as a qualified call, a quote or a closed deal, sent back to Google, Meta or LinkedIn and matched to the original ad interaction. It lets platforms measure and, where supported, optimise towards outcomes beyond form fills.

03MQL vs SQL: what is the difference?

A marketing-qualified lead is one marketing believes is worth passing to sales, based on fit and engagement. A sales-qualified lead is one sales has contacted and confirmed as a real potential buyer. For paid ads, SQLs are usually a stronger optimisation signal, but they arrive later and in smaller numbers.

04Which lead stage should I send to ad platforms?

Send the earliest stage that reliably predicts revenue and arrives quickly and often enough for the platform’s requirements. A deeper stage like a won deal isn’t automatically better if it takes months or happens rarely; use it to review campaigns instead.

Put the terms to work

See where these signals are missing in your accounts.

The free assessment checks what your conversions count and where lead quality is likely leaking across Google, Meta and LinkedIn.