Definition
A conversion is an action you care about (purchase, signup, lead, subscription) that you measure and optimize toward.
Example
If a user completes a checkout after clicking an ad, that purchase is a conversion.
How to use it
- Define conversions with clear eligibility (new vs returning users) and a time window.
- Audit conversion tracking after site releases and checkout changes.
- Keep platform and analytics conversion definitions consistent where possible.
- Separate primary conversions from secondary micro-conversions.
Common mistakes
- Changing conversion definitions mid-stream and breaking trend comparisons.
- Counting duplicate events (inflates performance and misleads bidding).
- Optimizing for low-value conversions that do not drive revenue.
Measured as
Measure Conversion with a fixed attribution window, conversion event, and spend basis before comparing campaigns or creative tests.
Misused when
- Changing conversion definitions mid-stream and breaking trend comparisons.
- Counting duplicate events (inflates performance and misleads bidding).
- Optimizing for low-value conversions that do not drive revenue.
Operator takeaway
- Define conversions with clear eligibility (new vs returning users) and a time window.
- Audit conversion tracking after site releases and checkout changes.
- Keep platform and analytics conversion definitions consistent where possible.
- Use Conversion only inside a stable attribution rule, conversion definition, and time window so campaign comparisons stay honest.
- If performance changes, check whether the metric moved for a real business reason or because the measurement setup changed underneath you.
Next decision
- Read UTM + GA4 attribution: practical tracking for paid ads (without lying to yourself) if the decision depends on interpretation, policy, or trade-offs beyond the raw formula.
- Decide which report owns Conversion before comparing campaigns, channels, or creative tests.
Where to use this on MetricKit
Guides
- UTM + GA4 attribution: practical tracking for paid ads (without lying to yourself): A practical guide to UTMs and GA4: consistent source/medium/campaign tagging, conversion deduplication, and common attribution traps.