If you're unsure about the answer, return to the relevant section by clicking on the underlined phrase in the Answer Key. Name three primary types of search services.
Web directories use people to review and categorize sites.
A search engine indexes all pages with keywords, not just the home pages of Web sites. A compiled list integrates all of the matches to eliminate duplicates. It ranks all of the matches at once. A sequential list separates the results by each search service. Most search services list the results with the most relevant match first.