Detect publish dates, update signals, and freshness markers that affect rankings.
Detects Schema.org datePublished and Open Graph times.
Finds dateModified and HTTP Last-Modified headers.
Calculates how old the content is based on dates found.
Google's QDF algorithm boosts recent content for time-sensitive queries. Regular updates signal active maintenance.
Through Schema markup (datePublished, dateModified), HTTP headers, and visible date changes.
Refresh evergreen content quarterly and update statistics annually.