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            SEARCH ENGINE OPTIMIZATION                  Search engines have two major functions - crawling & building anindex, and providing answers by calculating relevancy & serving results.Imagine the World Wide Web as a network of stops in a big city subway system. Each stop is its own unique document (usually a web page, but sometimes a PDF, JPG or other file). The search engines need a way to “crawl” the entire city and find all the stops along the way, so they use the best path available – links. Search engines have two major functions - crawling & building an index, and providing answers by calculating relevancy & serving results. 1. Crawling and Indexing Crawling and indexing the billions of documents, pages, files, news, videos and media on the world wide web. 2. Providing Answers Providing answers to user queries, most frequently through lists of releva...