By now you probably have a fuzzy picture of how a search engine works. But there’s much more to it than just the basic overview you’ve seen so far. In fact, search engines have several parts. Unfortunately, it’s rare that you find an explanation for just how a search engine is made — and that information is vitally important to succeeding with search engine optimization (SEO).
The query interface is what most people are familiar with, and it’s probably what comes to mind
when you hear the term “search engine.” The query interface is the page that users see when they
navigate to a search engine to enter a search term.
The interface was a simple page with a search box and a button to activate the search. Today, many search engines on the Web have added much more personalized content in an attempt to capitalize on the real estate available to them. For example, Yahoo! Search, allows users to personalize their pages with a free e-mail account, weather information, news, sports, and many other elements designed to make users want to return to that site to conduct their web
One other option users have for customizing the interfaces of their search engines is a capability like the one Google offers. The Google search engine has a customizable interface to which users can add different gadgets. These gadgets allow users to add features to their customized Google search home that meet their own personal needs or tastes