What is a program that uses keywords to find results on websites on the internet?

A search engine is a program designed specifically to help users find information on the internet by using keywords. When a user enters keywords into a search engine, it scans its indexed database of websites to return a list of relevant results that match those keywords. This process involves algorithms that evaluate various factors, like content relevance and website authority, to determine which sites to display.

The importance of search engines lies in their ability to organize vast amounts of information from all corners of the web, making it easily accessible to users. Without search engines, navigating the internet would be extremely tedious, as users would have to manually visit countless websites to find specific information.

In contrast, anti-virus software protects computers by detecting and eliminating harmful software, forums serve as online discussion platforms for communities, and pop-up blockers prevent unwanted advertisements from appearing in browser windows. These functions are unrelated to the keyword-based information retrieval that search engines provide.