Google’s Panda Update is a filter introduced in February 2011 is to reduce the improper content that listed in the google search list..
- Panda updates takes place from time to time.
- Panda may also catch sites that escaped before.
Updates of Panda:
1, Feb. 24, 2011 (11.8% of queries; announced; English in US only)
2, April 11, 2011 (2% of queries; announced; rolled out in English internationally)
3, May 10, 2011 (no change given; confirmed, not announced)
4, June 16, 2011 (no change given; confirmed, not announced)
5, July 23, 2011 (no change given; confirmed, not announced)
6, Aug. 12, 2011 (6-9% of queries in many non-English languages; announced)
7, Sept. 28, 2011 (no change given; confirmed, not announced)
8, Oct. 19, 2011 (about 2% of queries; belatedly confirmed)
9, Nov. 18, 2011: (less than 1% of queries; announced)
10, Jan. 18, 2012 (no change given; confirmed, not announced)
11, Feb. 27, 2012 (no change given; announced)
12, March 23, 2012 (about 1.6% of queries impacted; announced)
13, April 19, 2012 (no change given; belatedly revealed)
14, April 27, 2012: (no change given; confirmed; first update within days of another)
15, June 9, 2012: (1% of queries; belatedly announced)
16, June 25, 2012: (about 1% of queries; announced)
17, July 24, 2012: (about 1% of queries; announced)
18, Aug. 20, 2012: (about 1% of queries; belatedly announced)
19, Sept. 18, 2012: (less than 0.7% of queries; announced)
20, Sept. 27, 2012 (2.4% English queries, impacted, belatedly announced
21, Nov. 5, 2012 (1.1% of English-language queries in US; 0.4% worldwide; confirmed, not announced)
22, Nov. 21, 2012 (0.8% of English queries were affected; confirmed, not announced)
23, Dec. 21, 2012 (1.3% of English queries were affected; confirmed, announced)
24, Jan. 22, 2013 (1.2% of English queries were affected; confirmed, announced)
25, March 15, 2013 (confirmed as coming; not confirmed as having happened)
26, March 24, 2014 (Unnamed Update)
27, May 16, 2014 (Payday Loan 2.0)
28, May 19, 2014 (Panda 4.0)
Panda 4.0 was the last update.. which impacts ~7.5% of queries in Enlgish languag and also it affects different languages to different degrees.
