There's no fixed universal cadence, but the practical rule is: revisit high-value pages often enough that facts, prices, and examples never go stale, and treat anything tied to fast-moving topics — pricing, tools, statistics — on a shorter cycle than evergreen explainer content. Quarterly reviews of top-traffic pages is a reasonable default for most small teams; monthly for genuinely fast-moving categories.
Freshness signals seem to matter more for AI answer engines than they historically did for classic SEO rankings, since a model surfacing outdated pricing or a dead statistic is a visible, embarrassing failure. Kando's Content Decay Detector flags pages that are quietly losing traffic, which is often the first sign content has gone stale.