Tuesday, 9 June 2015

History of seo

A Brief History of Search Engine Optimization

What is Search Engine Optmization?
Search engine optimization is the art and science of making web pages attractive to internet search engines. Some interne t businesses consider search engine optimization to be the subset of search engine marketing.

SEO History
In the beginning search engines used search algorithms that webmasters provided about the web pages. It didn't take webmasters very long to start abusing the system requiring search engines to develop a more sophisticated form of search engine optimization. The search engines developed a system that considered several factors; domain name, text within the title, URL directories, term frequency, HTML tags, on page key word proximity, Alt attributes for images, on page keyword adjacency, text within NOFRAMES tags, web content development, sitemaps, and on page keyword sequence.


In the middle of the 1990s webmasters and search engine content providers started optimizing websites. At the time all the webmasters had to do was provide a URL to a search engine and a web crawler would be sent from the search engine. The web crawler would extract link from the webpage and use the information to index the page by down loading the page and then storing it on the search engines server. Once the page was stored on the search engines server a second program, called an indexer, extracted additional information from the webpage, and determines the weight of specific words. When this was complete the page was ranked.

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