Final answer:
A program that browses the web and makes copies of all the pages it finds to make search engines more efficient is called a Crawler.
Step-by-step explanation:
A program that browses the web and makes copies of all the pages it finds to make search engines more efficient is called a Crawler. The crawler, also known as a web crawler or spider, automatically navigates through websites, following links from one page to another. It retrieves and stores copies of web pages, allowing search engines to index and analyze the content.