On Line even has its own search engine. Each of these search engines has a common characteristic. You need to write keywords in a frame or box to find information. Depending on how carefully you write the keywords, you may find the URLs and web sites you seek. I can, for example, place the keywords, Business Communication, in a frame on Altavista or appropriate search engine.
Hits mean how many entries come up for any particular set of keywords.
Therefore, I must narrow my search with better keywords, Memo Writing, for example, to improve my chances of finding the appropriate information. You are shopping for a computer, and the salesperson tells you 300 megahertz is better than 200 megahertz. Megahertz simply measures electricity flow through wires with those bits and bytes. Those 1's and 0's as part of the computer memory move quickly until they encounter some data not on the line. At this point you should be questioning the salesperson about a systems bus for that slowing of the data.