Web Publishing
A Sitemap Date Should Reflect a Real Change to the Page
A sitemap lastmod value is most useful when it records a meaningful page update. Check what your publishing system changes before trusting its dates.
SOFTWARE · SECURITY · DESIGN
technical SEO
Web operations
Before a Website Migration, Make a Redirect Map
Build a URL-by-URL migration map so old links lead to relevant new pages, then test redirects, internal links and indexing signals after launch.