HTTP Status Codes

HTTP status codes are three-digit numbers that web servers send in response to browser requests, indicating whether a specific HTTP request has been successfully completed. These codes are grouped into five classes: informational responses (100-199), successful responses (200-299), redirects (300-399), client errors (400-499), and server errors (500-599). For SEO purposes, understanding these codes is crucial for troubleshooting crawling and indexing issues. The most important HTTP status codes for SEO include 200 (OK, indicating the request succeeded), 301 (permanent redirect), 302 (temporary redirect), 404 (not found), and 500 (server error). Search engines use these codes to determine how to handle pages during crawling and indexing. For example, a 301 redirect passes most link equity to the destination URL, while a 404 signals that content should be removed from the index. Regularly monitoring HTTP status codes through tools like Google Search Console or log file analysis helps identify critical SEO issues such as broken links, redirect chains, or server problems. Implementing proper status codes ensures search engines can efficiently crawl your site, understand content relationships, and maintain an accurate index of your pages, directly impacting your site's visibility in search results.