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
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
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.
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