SEO means search engine optimization. It is optimizing a web page for search engine.search engine perform 3 activities in order to deliver search results. These process are
1. crawling
2.catching
3.indexing
crawling means the Google sends its spiders to your website. In catching Google took a snap shot of your website and in indexing saving your information in database.
There are 2 ways for optimization
1.On page optimization
It includes provide good content, good keywords for the modification of web page.
2.Off page optimization
It includes link building and link popularity.
SEO techniques are divided into two groups.
1.White Hat SEO
White hat SEO will work legally, it ensures good content and good quality of web page.
2.Black Hat
SEO
Black Hat SEO will work illegally and attempting ranking improvements that are disapproved by the search engine
Google Updates
1.Google Panda Update
Google’s Panda Update is a search filter introduced in 2011 february 23 meant to stop sites with poor quality content, Gramer mistake,spelling mistake, content spinning from working their way into Google’s top search results.
2. Google Penguin Update
Google launched the Penguin update in April 24, 2012. This update was designed to find and punish websites involved in over optimization.
3.Pirate Update
Google's Pirate update is introduced in august 2012 designed to prevent sites with many copyright report.
4.Pigeon Update
The pigeon update was released by google in July, 2014.This update was released to provide more accurate results by taking into account the distance and location of local brands from the searcher.
5.Hummingbird Update
Google launched the Hummingbird update in September 2013. It is designed to focus on the meaning behind the word.
6.EMD Update
EMD stands for Exact Match Domain. This update was released in September 2012. The EMD update devaluates domain names which are exactly matching its keywords if content quality of the pages is not good.
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