What is the use of a program in SEO related information?

What is the use of a program in SEO related information?

- The program receives the information using the search request and then it compares the entry with the index and according to that show the results.

- Program allows the search engine to use a structured directory that includes the topics and allow the search engine to crawl the data from the web.

- Program allows the web portal sites to offer the search engines and directories that find the information and make it accessible to all.

- It includes the basic components and features essential for the users to be used for the better optimization of the search engines.

- The components work together to provide the information for the search engine to perform better.