New Algorithm: Anti Spam

Any additional info about this?

Google has announced that it is releasing a new search algorithm that it hopes will better catch people who spam its search results or purposely do things to rank better that are against Google’s publishers guidelines. Going live today, Google says it will impact about 3% of search queries.

Source:
http://searchengineland.com/google-launches-update-targeting-webspam-in-search-results-119295

 

this latest changes affected a lot of sites. my sites affected tough i don't have any spam.

 

YES I RIGHT Algorithm: Anti Spam UPDATE IF ANY ONE DROP RANK AND BLOCK GOOGLE PLEASE CONTACT ME I AM HELP I AM EXPERT TO DETECT ANY PROBLEM YOU WEBSITE PLASE CONTACTE ME MY SKPE IS :FAIZYKK

 

Yes many more sites are affected by this new algorithm, so we should be more careful while working and we should follow the pure white hat SEO activities so that our site should not be affected with any type of new algorithm...........

 

Does anyone have any examples or specification of how this is actually going to affect?
Or what does it check exactly?