Evolution of SEO over years
Link Specific
The websites having more links became the number one in Google page ranking
Quality link specific
When fraudsters tried to add links that does not direct to quality pages, google introduced Quality link specific
The links that have given in the ages must be related to the content in the page and a useful link.
Passing the juice: reducing the page ranking of websites that sells links.
In 2008 Google added suggestions in searching.
When the user search for a specific keyword, related topics are suggested by google.
In 2009, google added a feature which give importance to the user interaction.
Website ranking was on the basis of interaction with the user.
t considered how much time a user spent on a specific website, how many links in the page is opened by the user, etc.
If a user closes a page immediately after opening it, its ranking will be decreased.
Pogo sticking: If a user open a link and close it without spending enough time on it, it is called pogo sticking.
Bounce rate: Percentage of users that spent less time on a website or does not make any interactions on the website.When bounce rate increases, authenticity of the website will be decreased.
Social media
Google added social media as a part of the ranking system. If a website is shared inn social media, its ranking will be increased.
Social media authority value: If the social media is interacted with people with more authority value, then its ranking will be increased.
Panda
Content spamming
Content duplication: Copying the contents of another websie.
Content spinning: Content is repeating in a page.
Thinny pages: Pages with very less content
Errors/Spelling mistakes/grammar mistakes/less quality content.
Panda 4.0
Google added Panda as a permanent filter in its algorithm. Panda has now been fully integrated into Google's main algorithm.
Penguin
Updation to avoid link spamming.
Penguin 4.0
Google added a feature to check the spam links at the time of addition of the page.
Pegion
Google give search results according to local ranking.
The search results will be based on the location of the user.
Parked Domain Updtion
There was a scenario like booking the website and maintain it as 'parked'.
So Google made an updation and so that the parked domain names does not appear in search results.
Pirate Updation
If the content/image of another website is copied, lawsuit can be charged.
I have already published a post on the 'History of SEO'.
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