The term 'Web Search Center' can be summarized as a search engine, specifically Google, which is a 6-letter word. Google is a web-based search engine that allows users to search for information on the internet. It is one of the most popular search engines and is used by millions of people around the world. Google provides a variety of services such as web search, image search, video search, news search, and more. It also offers other services such as Google Maps, Google Drive, and Google Docs. Google has become an essential part of our lives and is used for many different purposes.