The well-known online search engine Google still being used in mainland of China, even they shut down the “Google China” service. Chinese sometime prefer to use “Google Hong Kong” instead. The reason of that is Google provides results of search more reliable and efficiency. However, Google still quitted the market of China. The work progress of search engine is more complicate than just search the key-words. The key-words could be link to every websites that used the word, sometime it just have nothing to do with the main point. According to Curt Franklin, the search engine’s works basically performs three tasks: (http://computer.howstuffworks.com/internet/basics/search-engine.htm)
Search the Internet, or select pieces of the internet based on important words.
Keep an index of the words they found, and where they found them.
Allow user to look for words or combinations of words found in that index.
In that index, they don’t only sort the websites by key words, but also by contents. So each time we search something by words, in order to get what exactly we need, the system would find out more results that link to these words in the index. That’s how that’s how sometime we got results helpful but have no same key words with what we typed in. Search engines always provide free search experience for users; they make money from other websites. For websites, of no one check on at all, that won’t be necessary to exist. Search engines are just a good way to bring those websites in front of people’s eyes. According to Grant Crowell, there are a lot ways to make money for a search engine website. They can all sort into 3 aspects: (http://searchenginewatch.com/article/2066421/How-Search-Engines-Make-Money)
Provide unique search technologies, a search engine has to consider what differentiates its search product from others. And they can sell the technologies to others.
Commercial search results, which means those