indyank - 3:46 am on Jan 21, 2013 (gmt 0)

I have no idea if this is the right place to post but since 1-2 weeks Facebook is showing me ads based on my google searches.

if you are logged into facebook or the FB cookies themselves could keep track of your every action like pages visited on the web etc. It is something similar to what google had been doing for years to show you relevant ads.