How Crawlers Work
As the information on the internet increases, search engines use crawlers to organize the information quickly and efficiently. The spiders' effort is aimed at indexing and disseminating information very quickly, operating in an orderly manner.
A good book, for example, must be well organized, otherwise it will be incomprehensible. Similarly, the crawler scans all the content of the sites and creates a table of contents that lists all the information in an easy-to-understand order. This way, when someone makes a search query, a quick glance at the table of contents will be enough.
It is important to learn how to use crawlers correctly so that they can be a valid ally during searches. One of the ways to favor the crawler's activity is to create a sitemap so that it does not scan useless pages of websites.
To this end, it is advisable to use the Robots.txt protocol , which is also useful for preventing indexing by other malicious crawlers intent on stealing data.
