The robots.txt file is also known as a standard or procedure for excluding robots. It's a little file that notifies search engine bots whether or not they're allowed to explore your site. You can also warn search bots about the pages you don't want indexed, such as those with duplicate content or that aren't developed.
If you write it manually, it will take a long time. A robot.txt file comprises User-Agent, and under it, you may also write other directives such as Allow, Disallow, or Crawl-Delay. However, by using this application, you may create your file in a matter of seconds.
Bots may crawl particular regions of your website thanks to the Robots.txt file. Before a search engine crawls your site, it consults the robots.txt file for instructions on how to crawl and index it in search engine results.
If you don't index duplicate and broken pages on your website, specific regions of your site, login pages, or XML sitemaps, robots.txt files are vital and beneficial. Because search engines focus on the most important sites to crawl, you can use the robots.txt file to delete pages that provide no value to your website.
Because search engines can only crawl a certain number of pages each day, it would be useful to them if you blocked some unnecessary URLs so that they could crawl your pages more rapidly.
If your website doesn't have a robot.txt file, there's a good chance that crawlers won't index all of your pages. The crawl budget is used by Google, and it is dependent on the crawl limit, which is the amount of time a crawler spends on a website.
If Google detects that crawling your site is bothersome, it will begin to crawl your site more slowly. It implies that when Google sends its crawler to your website, it will only scan a few pages, and your most recent post may take some time to be indexed.
To get around this restriction, you'll need a robots.txt file and a sitemap for your website. These files will help the crawling process by indicating which links require additional attention.
For many websites, especially small ones, having a robots.txt file isn't necessary.
Having said that, there's no reason why you shouldn't have one. It provides you more control over where search engines are allowed and are not allowed on your website, which can help with things like:
preventing redundant content from being crawled;
Keeping confidential parts of a website (for example, your staging site);
preventing internal search results pages from being crawled;
Keeping the server from becoming overburdened;
Keeping Google's "crawl budget" from being squandered.
Images, movies, and resource files are not allowed to show in Google search results.
