Technical SEO
Important
Last-Modified Header
priority_high Why it matters
Not a ranking signal. Google uses sitemap lastmod for crawl scheduling and recommends ETag over Last-Modified. Main value is CDN cache validation.
search What we check
Whether the server sends a Last-Modified HTTP header, useful for CDN cache validation.
build How to fix
- 1 Configure your server to send a Last-Modified header reflecting the content's last change.
- 2 Note: Google recommends ETag over Last-Modified for HTTP caching.
- 3 For SEO crawl scheduling, use sitemap <lastmod> instead.
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