Myth: you should judge an update's impact on day one

Myth: you should judge an update's impact on day one
This week on the radar — panic charts posted hours after an update starts.

The correction
Google states core updates roll out over roughly two weeks, with movement continuing the entire window.

Confirmed
— Google Search Status Dashboard — publishes start and completion dates; the gap is typically 1–3 weeks, and rankings shift across it.

Read this
— Search Engine Roundtable — repeatedly documents day-one reactions reversing by day ten as the rollout settles.

Chatter
— Analysts on SEO Twitter/X caution against acting on partial-rollout data, since intermediate states aren't the final picture.

The nuance: note your day-one position, but read the trend only after the dashboard marks the rollout complete.

One to bookmark: the Search Status Dashboard — the canonical source for when an update actually starts and ends.