You track new posts and ignore the slow death of old ones

You track new posts and ignore the slow death of old ones
Client obsessed over how new posts launched. Nobody watched the back catalog. Quietly, 25% of the library was decaying — losing a little traffic every month for a year. By the time anyone noticed, it was a cliff, not a slope.

Set up a monthly decay sweep:
— Compare each page's last 90 days vs the prior 90
— Flag any losing BOTH clicks and impressions (real decline, not seasonal)
— Queue the worst offenders for refresh

Content rots if you don't feed it. Watch the back catalog or it bleeds out quietly. Set the sweep.