Conversion
Also called goal, key event, conversion event.
An action you count as success: a purchase, a signup, a booked call, a form sent.
A conversion is whatever action you decide counts: an order, a lead form, a booked call, a trial started. Each tool names it differently: GA4 calls it a key event, Google Ads a conversion action, Meta a conversion event, and Sporetag a goal.
The same conversion is counted differently by each tool, because each has its own attribution rule, window and blind spots. Your store or CRM is usually the source of truth for how many happened.
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