Pages lose clicks quietly, long before a ranking drop looks obvious. Diagnostics reads your Search Console data every night and surfaces the decay and drops worth explaining.
Decay rarely trips an alert. We compare two windows of your own data and flag pages sliding down before the loss is painful, so you can act while it still matters.
A page sliding down, flagged before the loss is severe.
When a real drop happens, you get the context: which queries, which pages, and the window it covers, so you can separate a Google update from something you changed.