Rental and Services Rate Compare you create and publish content on the Web, ideally, you want to do so with a knowledge of the framework which you are working within. Chances are that you want what you've created to be found by others who might be interested in it, through search engines, through social sites, through directories, and in other places that might help what you've created to become easier to find.
Search Engines aim at helping people find relevant and useful information, services and goods that they might be interested in, and resources that can help them meet possible future goals. Search engines have been evolving over time from approaches that involve simple keyword matching between documents and queries used to find them, to processes that attempt to understand the intent behind those queries.
When PageRank and the HITS algorithm were introduced in the 90s, they signalled a change in search that looked closely at the link structure behind the Web, to try to bring more "important" pages to the tops of search results. SEO didn't become irrelevant with that change but rather evolved to reflect the changes at the search engines.
In the days since, the search engines have started looking at many other signals to rank pages, based upon the queries used by searchers. Instead of just looking at whether words in a query also appear on pages, and the quality of links pointing to pages, search engines have started to consider signals that reflect upon the quality and relevance of pages to queries used to find them, such as the search and browsing history of searchers, quality factors associated with websites such as speed, lack of duplicated content across multiple pages, and many others.
Search Engines have also tried to get a better understanding of the intent behind queries, such as whether the query evidence and intent to find results related to a specific geographic location, or to find or refind a page that someone has visited before, or to locate information on a specific topic, or to perform some kind of transaction.
Search engines have also begun offering the ability to find much more than websites, branching out into vertical searches involving products, images, video, businesses at specific locations, real-time social messages. They've started offering location-based services, messaging and social interactivity. They've begun to offer services appropriate for the small screens of handheld devices, and the large screens of televisions.
SEO has become increasingly more relevant in light of the many changes at search engines, as it evolves to meet changes from the search engines.
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