Google updates
Google changes its search algorithm around 500–600 times in every year, called Google updates. While most of these changes are minor, Google occasionally rolls out a "major" algorithmic update (such as Google Panda and Google Penguin) that affects search results in significant ways.
For search marketers, knowing these Google updates can help explain changes in rankings and organic website traffic and ultimately improve search engine optimization. Below, we’ve listed the major algorithmic changes that have had the biggest impact on search.
1. Google Panda update(Google Farmer updates)
Google updates their algorithm against content spamming in February 2011
Google’s Panda Update is a search filter meant to stop sites with poor quality content from working their way into Google’s top search results.
Panda is updated from time-to-time. When this happens, sites previously hit may escape, if they’ve made the right changes. Panda may also catch sites that escaped before. A refresh also means “false positives” might get released.
Content spamming like keyword stuffing, content plagiarism (use duplicate content), use of low-quality contents, content spinning (rewrite your article in different ways), use of tiny content.
In mid-July, Google released Panda 4.2, the latest Panda Algorithm updates.
2. Google Penguin updates
Google published the Penguin update in April 2012 to improve the quality of sites, those doing so by buying links or obtaining them through link networks designed primarily to boost Google rankings.
When a new Penguin Update is released, sites that have taken action to remove bad links or to remove spam may regain rankings. New sites not previously caught might get trapped by Penguin.
Link spamming like link exchange, link selling, link farming, comment spamming, wiki spamming are surely catch by penguin.
3. EMD (Exact Match Domain) updates
EMD stands for Exact Match Domain. The spamming like create websites as exact matching websites before created will catch by this update.
When a fresh EMD Update happens, sites that have improved their content may regain good rankings. New sites with poor content or those previously missed by EMD may get caught. In addition, “false positives” may get released.
4. Hummingbird updates
Hummingbird makes Google almost human with the way it responds to queries. Instead of looking at keywords, Hummingbird makes Google look deeper and focus on the whole statement or question.
Rankbrain update is an advanced version of Hummingbird update.
5. Pigeon update
To improve the quality of local searching Google provides location and distance in order to search results to get better search results to the user. It is like shown below.
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