The Internet is larger than any one person can imagine. Not only are there millions of web sites, but they change daily. When we search the web, we are asking a computer program to go out into this electronic sea and bring back the information we want. These are computer programs designed to seek out requested information in this form. The Internet is too big.
Every search engine looks for information differently.
Some by words in coding, others by words in texts, and still others through descriptions of pictures. An advanced searcher understands how engines search and uses that information to find information quickly. Some search engines choose the sites to show you based on popularity. While they may be popular these sites may not contain valid information. The user must determine a sites validity.