The document outlines various Google algorithms, including Panda, Penguin, Pigeon, Pirate, and Hummingbird, detailing their launch dates and primary focuses such as content quality, backlink relevance, local search ranking, and copyright issues. Additionally, it mentions other algorithms concerning issues like page layout and mobile friendliness. The summary serves as an overview of the factors influencing web ranking changes.

1. Google Algorithm
The Secret Reason For Losing Web Ranking
By Shakib Sumon

2. Google Panda
• Launched 11 Feb 2011
• 28th 4.1 Ver. Released Sept. 2014
• Looking for Content Structure
• Against Thin & Poor Content

3. Google Penguin
• Rollout 24 April 2012
• 23 Sept 2016 – Real Time (4.0 V.)
• Find Irrelevant Backlink
• Many Website Lose Rank

4. Google Pigeon
• Working for Local Search Ranking
Google Pirate
• Working for Copyright Issue
Google Humming Bird
• Google Search Algorithm

5. More Algorithms….
• Payday
• Page Layout
• Google Mobile Friendly
• In The News Box
• Authorship Photo Drop
• Google Freshness

6. Thank You