What are HTTP status codes in web scraping?

What are HTTP status codes?

HTTP status codes fall into five categories: 2xx (success), 3xx (redirect), 4xx (client error), and 5xx (server error). Web scrapers must handle each appropriately—following redirects, retrying on 5xx, and adapting when 4xx signals blocks or rate limits. See 200 status code, 403 error, 404 error, and 429 error for details on the most common codes in scraping.