Google started its meteoric rise in the world of online search back in 1998. From such small beginnings grew the giant that Google is today with leading search market share in Ireland, US and in fact most countries outside of Russia and China. In Russia the primary search engine is Yandex, while in China it is Baidu.
Google's rise
The initial challenge for Google was to crawl the web efficiently. At the beginning there were 30 to 40 million web pages to spider. But now it's hundreds of billions. But Google has built the technology to be able to perform this feat in a very short timeframe. New content is indexed almost straight away for sites that are updated regularly. The goal of search quickly became to give the searchers relevant and quality results.
How Search Engine Optimization Began
In the beginning, those who were responsible for websites realised that there were great opportunities to market themselves using Google's search results. This is where search engine optimization began. Initially, the search algorithm was relatively basic and onsite strategies were used by search engine optimization (SEO) practitioners. These included the use of keywords in meta data and content.
The concept of PageRank was introduced and the importance of the sites external links became prominent. The search engine results page (SERP) ranking of a site or web page is a function of its PageRank as well as a variety of over 200 other factors. Linkbuilding became a key requirement in search engine optimization and with it the 'anchor text' used for the link. This is the keyword enriched text that is used for the link.
When Google Instant hit the search screens in 2010 this changed the way that searchers performed searches. Therefore, it affected the way that SEOs optimized sites. As so many searchers chose from the keywords suggested by Google Instant instead of typing in their own search query these now often feed into the keyword research component of search engine optimization.
Also in 2010, one of the big changes was the emphasis on load speed. The time taken for a website to load became regarded as a key quality signal for the end user. The typical user's attention span on the web has shortened considerably since the early days of web usage and expectations are much greater. Load speed is now on the checklist of things to measure in the course of a search engine optimization site audit and load speed diagnostics have now been incorporated into the Google Webmaster Tools.
Social Search
Twitter has been feeding search results for some time now and some research has been done by SEOMoz to show the impact of tweet links on search engine results rankings. Google does not have access to Facebook data and links from Facebook are all no-followed. This means that the links do not confer any link juice. But as the web becomes increasingly social, this will continue to feed into search.
Technical Changes
In the region of 500 changes are mad to the search algorithm in a year. Not all of these are announced and most are just small tweaks. But any of them could be affecting the search position your website is returned in. The role of the seo is to follow these changes and respond accordingly.
The most recent change to the Google search algorithm was significant and has impacted on the way many perform search engine optimization. The change, known as the Farmer Panda update, was directed at trying to lower the rank of low quality sites including those known as 'content farms'. Sites like these often have duplicate content or low quality content which Google feels adds little value to the user.
What's Next in Search
In 2011, one of the key factors in the future of search is Google +. This will give Google a great deal of sharing data, the kind of data that Facebook has in spades but that has not been available to Google before. It is likely that this recommendation and sharing data will feed into search results before too long.
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