What Is a Custom Conversion? Rules Built on Existing Events
DICTIONARY · META ADS

What Is a Custom Conversion?

A custom conversion is a conversion definition based on specified events or rules.

In plain English

It is built from events you already send, narrowed by a rule: a purchase above a certain value, a lead from a specific page, a signup for one product rather than another.

This is different from a custom event. No new tracking is needed; you are defining a subset of existing data as a distinct conversion.

What to know

Built from existing events
No new code required.
Rule-based
URL, parameter or value conditions.
Optimisable
Campaigns can target them directly.
Useful for separation
Distinguishing product lines or lead types.

Why it matters

Custom conversions let you optimise toward the valuable subset rather than all conversions. Optimising to high-value purchases rather than all purchases is a straightforward improvement.

Common mistakes

×Rules so narrow the conversion rarely fires.
×Overlapping definitions counted separately.
×URL rules that break when the site changes.
×Creating them without using them in any campaign.

FAQs

Custom conversion or custom event?

Custom conversion where existing events can be filtered. Custom event only for genuinely new actions.

Can I optimise toward one?

Yes, provided it fires often enough to learn from.

WRITTEN BY TARIQ SALLAM
Marketing Consultant. Entrepreneur. Content Creator.

I'm a marketing consultant, entrepreneur and content creator. I help businesses grow through practical marketing, websites, SEO, content and AI.

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