Why was one of my changes reverted?

Some changes do not work out. A bid cut can lose more revenue than it saves; a raise can buy traffic that does not convert.

When day-5 evidence says a change made things worse, AutoPPC records that and proposes putting it back. Every change already carries its inverse, so restoring is mechanical.

A reversion is not a failure of the system — it is the system doing the job. The alternative is a change that quietly does damage for months because nobody went back to look.