Final answer:
A search engine requires you to enter a word or phrase, also known as search text or a query, that describes the item you want to find. Operators like AND and quotation marks can be used to make your search more specific.
Step-by-step explanation:
A search engine requires you to enter a word or phrase, also known as search text or a query, that describes the item you want to find. The search engine then uses algorithms to match your query with relevant web pages and display the results to you. To make your search more specific, you can use operators like AND and quotation marks to include certain words or phrases in your search. For example, if you're looking for information on ethics in artificial intelligence, you can search for "ethics" AND "artificial intelligence".