40 Changes in Google - Google Algorithm Update - February 2012

Google official announced 40 changes for February in Google Algorithm. If you are looking for these changes then you can read out here

1) More coverage for related searches
2) More coverage for related searches
3) Less duplication in expanded sitelinks
4) More consistent thumbnail sizes on results page
5) More locally relevant predictions in YouTube
6) More accurate detection of official pages
7) Refreshed per-URL country information
8) Expand the size of our images index in Universal Search
9) Minor tuning of autocomplete policy algorithms
10) “Site:” query update
11) Improved detection for SafeSearch in Image Search
12) Interval based history tracking for indexing
13) Improvements to foreign language synonyms
14) Disabling two old fresh query classifiers
15) More organized search results for Google Korea
16) Fresher images
17) Update to the Google bar
18) Adding three new languages to classifier related to error pages
19) Improvements to travel-related searches
20) Data refresh for related searches signal
21) International launch of shopping rich snippets
22) Improvements to Korean spelling
23) Improvements to freshness
24) Web History in 20 new countries
25) Improved snippets for video channels
26) Improvements to ranking for local search results
27) Improvements to English spell correction
28) Improvements to coverage of News Universal
29) Consolidation of signals for spiking topics
30) Better triggering for Turkish weather search feature
31) Visual refresh to account settings page
32) Panda update
33) Link evaluation
34) SafeSearch update
35) Spam update
36) Improved local results
37) Flight Search on mobile
38) Improved health searches
39) Better related searches for images
40) Upcoming concert dates

You can read all 40 changes in details by visiting Search quality highlights: 40 changes for February on Inside Search (Official Google Blog)