Content decay is the gradual decline of pages that once performed well. Nothing broke and nothing was penalised. The page stayed the same while the results around it moved on, and the erosion is slow enough that nobody notices until the cumulative loss is substantial.
It is distinct from a sudden decline, which usually has a specific cause. See why organic traffic dropped.
Why pages decay
- Competitors published something better. The most common cause and the least dramatic.
- The information aged. Figures, tools, screenshots and recommendations that were current became stale.
- Search intent shifted. What people expect from the query changed while the page did not.
- The results page changed shape, absorbing clicks above the organic results.
- Internal support eroded. Links to the page were removed during redesigns and never replaced.
- Newer pages of your own began competing for the same query.
Spotting it
Decay hides in aggregate reporting, because the site total can rise while individual pages fall. It has to be looked for at page level.
- Compare page-level traffic year on year rather than month on month.
- Look for pages that peaked twelve or more months ago and have declined steadily since.
- Check average position drifting downward gradually rather than dropping.
- Watch for impressions holding while clicks fall, which is a results-page change rather than a ranking one.
- Sort your top pages from a year ago by current performance. The decayed ones stand out immediately.
Which pages to rescue
Not all of them. Decay is sometimes appropriate, and effort should go where it pays.
- Rescue: pages with commercial value that are still relevant and still have impressions.
- Rescue: pages that were significant traffic sources and address queries people still search.
- Leave: pages about genuinely obsolete topics.
- Consolidate: pages that decayed because a newer page of yours does the job better. See when to merge SEO pages.
- Retire: pages with no impressions and no commercial relevance.
Rescuing a decayed page
- Compare against what now ranks and name the specific gaps rather than adding length.
- Update anything factually stale, which is often why the page lost credibility.
- Check whether intent shifted, in which case the page may need restructuring rather than updating.
- Restore internal links, which frequently disappeared during a redesign.
- Resist changing the URL, which discards its history.
Do not simply update the published date. It changes nothing and it is a habit that substitutes for the actual work. See content optimisation vs new content.
Preventing it
- Schedule review of your highest-value pages rather than only publishing new ones.
- Track page-level performance year on year as a routine.
- Check internal links after every redesign.
- Assign ownership so pages have someone responsible for keeping them current.
Frequently asked questions
How fast does content decay?
It varies enormously. Time-sensitive topics decay within months; evergreen topics can hold for years. What matters is the trend on your own pages rather than a general rate.
Is decay inevitable?
For most pages eventually, unless maintained. Competitors keep publishing and information ages. Maintenance is what distinguishes a library that compounds from one that erodes.
Should I update or rewrite?
Update where the structure still fits the intent and only the substance is stale. Rewrite where intent has shifted and the page is now the wrong shape for the query.
Does republishing with a new date help?
Not on its own. What helps is genuine improvement. Changing the date without changing the content is cosmetic and widely recognisable as such.
Consulting CTA
If your older pages are quietly declining, book an SEO consultation to identify which are worth rescuing.