Search engines are the most powerful tools available to search the Net, giving far greater depth and scope than a directory ever could, but for younger students and novice searchers, directories may be the best option particularly if the search is fairly broad or on a theme. Directories Directories contain preselected information divided into categories. Best suited to general, broad-based enquiries. Demonstrates the information hierarchy very clearly. By clicking through categories it is possible to locate information quickly and easily.
Most directories allow keyword or natural language searches.
Moderated by humans. Fewer but more relevant sites make selection easier. Users do not have to cope with the full impact of the Web. Search Engines Search engines are the most powerful Internet search tools. They use robots or spiders to search the vast reaches of the Net, storing links to and information about each page in giant databases.