There is no right or wrong answer for when to do a content audit, as each site is unique, but there are signals it is time to do a content review.
And an annual performance audit doesn’t hurt either.
One thing to be careful of is changing things just because you got a temporary ding, a C-suite executive panics because of seasonality, or there are fluctuations during a search engine update.
Many times, when search engines like Google update, they do a rollback, and good content and pages will come back.
Don’t rely on updates as a sign it’s time to audit your content exclusively.
