Attribution is the process of assigning credit to marketing interactions that contribute to conversions.
It matters because analytics turns marketing activity into decisions. Without clear measurement language, teams may misread performance, overvalue the wrong channels, or miss the actions that actually drive revenue.
Example
A customer clicks a search result, later returns through email and finally purchases. Attribution assigns credit to recorded interactions under a model; it does not automatically measure every unrecorded conversation, impression or offline influence.