What is a key function of a search engine?

• A. Protect user privacy
• B. Index web pages for information retrieval
• C. Control traffic on the internet
• D. Provide email services

Answer: (B)

A key function of a search engine is to index web pages for information retrieval. This process involves systematically browsing the internet and creating a database of web pages, which allows the search engine to quickly locate and retrieve relevant content in response to user queries.

When a user enters a search term, the search engine utilizes its index to find the most relevant web pages and presents them as search results. This indexing process is essential because it helps to organize vast amounts of information on the internet, making it accessible and searchable for users.

The other options highlight functions that are not typically associated with search engines. Protecting user privacy is important, but it is more relevant to web browsers and online services. Controlling traffic on the internet involves network management rather than searching for information. Providing email services pertains to email providers rather than search engines, which focus on retrieving content from the web rather than facilitating email communication.