Hi vigneshgopalakrishnan,

Blocking the social buttons will simply remove them from the displayed website, so it's impossible to directly mention the specific web page in your social profile by clicking a respective button. Here you can see a screenshot of social media buttons in AVG Forums which would be blocked if user choose to block Facebook, Twitter and Google+ buttons. If the buttons are displayed, the social networks could collect data about your activity (what websites are being visited).

Note that if you block the social buttons, your comments within the social networks are still tracked and recorded on the servers.

Feel free to ask here again if you need more information.