In practice
Tag every campaign consistently with UTM parameters, or paid visits get reported as direct and the channel loses its own results.
Compare it with organic on cost per qualified outcome, not on volume — the two channels answer different questions.
Why it matters
It is immediate and controllable, which makes it the right tool for launches, tests and seasonal peaks.
It stops the moment spend stops, which is why it belongs alongside organic rather than instead of it.
Related terms