301pysyvä

301pysyvä refers to the HTTP status code 301, meaning that the requested resource has permanently moved to a new URL. When a client requests a URL that returns 301, the server provides a Location header with the new address, and clients are expected to update bookmarks and search engines should transfer ranking signals to the new URL.

Use cases include migrating pages during site restructuring, changing URL paths, moving to a new domain, or consolidating duplicate content under a single canonical URL. A 301 signals that the move is permanent and that the old URL should be replaced in indexes and caches.

SEO and web performance considerations: a 301 redirects most of the link equity (ranking signals) from the old URL to the new one, helping preserve search rankings after a move. It is important to avoid redirect chains or loops, keep redirects concise, and update internal links and sitemaps accordingly. After migration, monitor traffic and rankings to ensure the transition is effective.

Implementation examples:

- Apache (in .htaccess): Redirect 301 /old-page.html http://example.com/new-page.html

or using mod_rewrite: RewriteEngine On; RewriteRule ^old-page.html$ /new-page.html [R=301,L]

- Nginx: rewrite ^/old-page.html$ /new-page.html permanent;

- IIS: use URL Rewrite module to configure a 301 redirect.

Caveats: browsers may cache 301 redirects, which can slow changes; verify redirects with tools like curl -I and avoid creating new chains. Overall, 301pysyvä is the standard method for permanently relocating web resources while preserving search visibility.