301 Redirect
A 301 redirect is an HTTP status code that indicates a permanent redirection from one URL to another, used to inform browsers and search engines that a webpage has moved permanently. It ensures users and bots are automatically sent to the new location, preserving SEO value by transferring link equity and preventing broken links. This is a fundamental technique in web development and server configuration for managing site migrations, URL changes, or content consolidation.
Developers should use 301 redirects when permanently moving or renaming web pages, such as during website redesigns, domain changes, or content restructuring, to maintain user experience and search engine rankings. It is essential for SEO optimization, as it signals to search engines that the old URL should be indexed under the new one, avoiding duplicate content issues and preserving traffic. Common use cases include redirecting old blog posts to updated versions, merging similar pages, or switching from HTTP to HTTPS.