The gradual decline in a page's rankings, traffic, and visibility over time as it becomes outdated or outcompeted.
ID
SS-DF-072
Confidence
High · 87
Evidence
Strong
Updated
2026-07-08
Definition
The gradual decline in a page's rankings, traffic, and visibility over time as it becomes outdated or outcompeted.
Content decay is the slow erosion of a page's performance after an initial peak, driven by ageing information, fresher competitors, shifting intent, or lost links. It is often invisible day to day but shows up as a steady downward trend in impressions and clicks over months. Because decay affects even previously successful pages, monitoring for it and refreshing at-risk content is one of the highest-return activities in SEO, frequently recovering more traffic than creating new pages.