About
SEO
Search Engine Optimisation (Optimization if you're Stateside) or SEO is a process by which internal and external aspects of a web site are adjusted to gain high search engine returns on key words and key phrase searches. Search returns are sometimes referred to as organic or natural.
 The majority of web traffic is driven by the major commercial search engines - Yahoo!, MSN, Google & AskJeeves (although AOL gets nearly 10% of searches, their engine is powered by Google's results). If your site cannot be found by search engines or your content cannot be put into their databases, you miss out on the incredible opportunities available to websites provided via search - people who want what you have visiting your site. Whether your site provides content, services, products, or information, search engines are a primary method of navigation for almost all Internet users.
Search queries, the words that users type into the search box which contain terms and phrases best suited to your site, carry extraordinary value. Experience has shown that search engine traffic can make (or break) an organization's success. Targeted visitors to a website can provide publicity, revenue, and exposure like no other. Investing in SEO, whether through time or finances, can have an exceptional rate of return.
search engine submission
Search engines are always working towards improving their technology to crawl the web more deeply and return increasingly relevant results to users. However, there is and will always be a limit to how search engines can operate. Whereas the right moves can net you thousands of visitors and attention, the wrong moves can hide or bury your site deep in the search results where visibility is minimal. In addition to making content available to search engines, SEO can also help boost rankings so that content that has been found will be placed where searchers will more readily see it. The online environment is becoming increasingly competitive, and those companies who perform SEO will have a decided advantage in visitors and customers.
HOW A SEARCH
ENGINE
WORKS
Search engines have a short list of critical operations that allows them to provide relevant web results when searchers use their system to find information.
- Crawling the Web
Search engines run automated programs, called "bots" or "spiders", that use the hyperlink structure of the web to "crawl" the pages and documents that make up the World Wide Web. Estimates are that of the approximately 20 billion existing pages, search engines have crawled between 8 and 10 billion. - Indexing Documents
Once a page has been crawled, its contents can be "indexed" - stored in a giant database of documents that makes up a search engine's "index". This index needs to be tightly managed so that requests which must search and sort billions of documents can be completed in fractions of a second. - Processing Queries
When a request for information comes into the search engine (hundreds of millions do each day), the engine retrieves from its index all the document that match the query. A match is determined if the terms or phrase is found on the page in the manner specified by the user. For example, a search for car and drivermagazine At Google returns 8.25 million results, but a search for the same phrase in quotes ("car and drivermagazine") Returns only 166 thousand results. In the first system, commonly called "Findall" mode, Google returned all documents which had the terms "car", "driver", and "magazine" (they ignore the term "and" because it's not useful to narrowing the results), while in the second search, only those pages with the exact phrase "car and driver magazine" were returned. Other advanced operators (Google has a list of11) can change which results a search engine will consider a match for a given query. - Ranking Results
Once the search engine has determined which results are a match for the query, the engine's algorithm (a mathematical equation commonly used for sorting) runs calculations on each of the results to determine which is most relevant to the given query. They sort these on the results pages in order from most relevant to least so that users can make a choice about which to select.
Although a search engine's operations are not particularly lengthy, systems like Google, Yahoo!, AskJeeves, and MSN are among the most complex, processing-intensive computers in the world, managing millions of calculations each second and funneling demands for information to an enormous group of users
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