robots.txt
is a plain text file used by websites to communicate with web crawlers and other automated agents about how they should interact with the site's pages. It provides directives that specify which parts of the website should be crawled or indexed by search engines, and which parts should be excluded.
robots.txt
:Location: The robots.txt
file is typically located in the root directory of a website (e.g., https://www.example.com/robots.txt
).
User-Agent: The file specifies user-agents (which are the names of web crawlers or bots) that the rules apply to. An asterisk (*
) can be used as a wildcard to target all crawlers.
Directives:
Disallow: /private/
prevents crawlers from accessing any content in the /private/
directory.Format: The file consists of plain text and follows a specific syntax. Each line typically starts with a directive followed by a colon and a value.
robots.txt
File:User-agent: *
Disallow: /private/
Allow: /public/
Crawl-delay: 10
robots.txt
:robots.txt
does not prevent access to the disallowed areas; it merely requests that crawlers refrain from accessing them. Malicious bots may ignore these rules.robots.txt
. Most reputable search engines like Google and Bing will comply, but some may not.In summary, robots.txt
is an essential tool for webmasters to guide how their content is crawled and indexed by search engines, helping to manage both visibility and server resources effectively.