XML Sitemap

Definition

An XML sitemap is a file (typically at /sitemap.xml) that provides search engines with a structured list of all the pages you want indexed. Each URL entry can include metadata like the last modification date, change frequency, and relative priority. Sitemaps help search engines discover pages that might not be found through internal linking alone.

Large sites may use a sitemap index that references multiple individual sitemaps, each limited to 50,000 URLs or 50MB uncompressed.

Why It Matters

While Google can discover pages through crawling links, a sitemap ensures that all important pages are known to search engines, even if they have weak internal linking. It also signals freshness: when you update the lastmod date, it tells crawlers to re-crawl that page.

Sitemaps are especially important for new sites (where crawlers have not yet discovered all pages), large sites (where some pages may be deeply nested), and sites that publish frequently (where timely indexing matters).

How Acta AI Handles This

Examples

A dynamic sitemap entry:

<url>
  <loc>https://example.com/blog/seo-guide</loc>
  <lastmod>2026-04-07</lastmod>
  <priority>0.8</priority>
</url>

This tells search engines the page exists, when it was last updated, and that it is relatively important compared to other pages on the site.