The history and evolution of SEO comes only after the invention of internet, websites and search engines. Let's see it,
The first prototype of the Internet was founded on 1960 with the creation of ARPANET(Advanced Research Projects Agency Network) by the U.S. Department of Defense. The world's first website born on 6th august 1991, the man behind the website was Tim Berners Lee. After that invention so many websites were born with different contents and functions. Eventually internet became crowded by those websites. Search engine platforms like Excite was founded on 1993 and made finding the information easier by sorting search results based on keywords within the content of the website.
Thereafter today's major search engine giants like Google and Yahoo comes to the internet world. Yahoo was founded on 1994 and Google was founded on 1997. These search engines simplified the data indexing methods and made the information on search more easier than Excite. In this initial state of search engine optimization practice, webmasters and business men used keyword stuffing, content spamming(spamdexing), link spamming etc. to leverage their websites and to increase rankings in search. In that time today's search engine giant Google start thinking about the opportunities for connecting users to perfect contents for their search on Google and starts working on that to implement the rules and conditions we have today.
In the era of unethical SEO practices, in-order to stop the unethical practices Google decided to share some of their search ranking tactics. Google's 'SEO starter guide' contains those details. Then Google takes some updations to increase the quality of the search results. The first updation was for the quality of the content. That is known as content specific search engine or niche specific search engine. This updation helps to reduce the keyword stuffing practices. Next updation was about links that is known as link specific search engine. Then Google made some modifications on that and updates it as quality link specific search engine. That is in order to get high ranking websites should have links from highly ranked websites, this updation reduces the link stuffing practice. But this creates another problem, website with higher page ranking starts to sell links and local websites were ready to buy and increase their ranking.
In-order to stop this practice Google made a condition, that is if a website is providing links to another website the equity and power of that website will be reduced this is called as 'SEO passing juice'.
In 2010 Google come up with a new updation that is ranking based on social media signals and user response. Google's next updation was Google Panda this updation was made to prevent content spamming. There are different kind of content spamming methods such as content copying, content spinning, spelling mistakes, grammar mistakes, paragraph interchanging etc., Google Panda updation removes these kind of pages. Google Panda is also known as 'The farmer'. Next updation known as Google Penguin, this updation made to prevent different kind of link spamming tactics such as link exchange, link buying, link selling, automatic link generation, URL submission on low quality directories,comment spamming etc. EMD and Parked domain updation were the next two updations both are about domains. EMD stands for exact match domains, large business groups will purchase exact matched domains for their business growth. If they are not using the domains effectively or if there is no positive development in those websites they will not rank and Google will remove those pages.
In-order to stop this practice Google made a condition, that is if a website is providing links to another website the equity and power of that website will be reduced this is called as 'SEO passing juice'.
In 2010 Google come up with a new updation that is ranking based on social media signals and user response. Google's next updation was Google Panda this updation was made to prevent content spamming. There are different kind of content spamming methods such as content copying, content spinning, spelling mistakes, grammar mistakes, paragraph interchanging etc., Google Panda updation removes these kind of pages. Google Panda is also known as 'The farmer'. Next updation known as Google Penguin, this updation made to prevent different kind of link spamming tactics such as link exchange, link buying, link selling, automatic link generation, URL submission on low quality directories,comment spamming etc. EMD and Parked domain updation were the next two updations both are about domains. EMD stands for exact match domains, large business groups will purchase exact matched domains for their business growth. If they are not using the domains effectively or if there is no positive development in those websites they will not rank and Google will remove those pages.
Google's next updation named as Google Penguin. This updation is very much helpful for local business. Results based on locality will give leverage for local business and industries. GoogleMyBusiness, local directory submission, local address with phone number and PIN code, Geo tagging etc are using in this updation. Google Hummingbird is the next updation. This updation results in semantic search reasults, personal search results etc. In 2015 an advanced version of HummingBird comes into action that is known as Rank Brain. This implements artificial intelligence to provide more user friendly information. 
The next was mobile friendly updation known as Mobilegeddon, due to this updation webmasters forced to create mobile friendly interface for their websites. Again in 2015 another mobile friendly updation takes place, known as AMP(accelarated mobile pages). Atlast in 12th May 2016 another mobile friendly updation comes to the scene.
The next was mobile friendly updation known as Mobilegeddon, due to this updation webmasters forced to create mobile friendly interface for their websites. Again in 2015 another mobile friendly updation takes place, known as AMP(accelarated mobile pages). Atlast in 12th May 2016 another mobile friendly updation comes to the scene.
History and Evolution of SEO in brief - Interesting Article.
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