Duplicate Content
Duplicate Content Issue
Substantially identical content appearing at multiple URLs, which can dilute search rankings and cause indexing confusion.
技术细节
XML duplicate contents follow the sitemaps.org protocol, listing URLs with optional lastmod, changefreq, and priority attributes. A single sitemap is limited to 50,000 URLs or 50 MB; larger sites use a sitemap index file that references multiple sitemaps. Google largely ignores changefreq and priority, relying instead on its own crawl scheduling. Sitemap submission through Google Search Console or a robots.txt Sitemap: directive ensures discovery of pages that might not be found through link crawling.
示例
```xml
<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<url>
<loc>https://peasytools.com/tools/pdf-merge/</loc>
<lastmod>2026-03-08</lastmod>
<changefreq>monthly</changefreq>
<priority>0.8</priority>
</url>
</urlset>
```
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