While the functionality to add social plugins to your drupal web pages is available through the Drupal for Facebook module, it is not entirely obvious as there are no options available to add, for example, a 'like' button to your nodes, or an activity stream in a block. Here are some suggestions for implementing these features on your site.
If you're not sure what the social plugins are, or how to use them, the handy list below will tell you put you in the picture and give you directions to implement them on your own site.
Like Button - The Like button lets users share pages from your site back to their Facebook profile with one click.
Send Button - The Send Button allows your users to easily send your content to their friends.
Comments - The Comments plugin lets users comment on any piece of content on your site.
Activity Feed - The Activity Feed plugin shows users what their friends are doing on your site through likes and comments.
Recommendations - The Recommendations plugin gives users personalized suggestions for pages on your site they might like.
Like Box - The Like Box enables users to like your Facebook Page and view its stream directly from your website.
Login Button - The Login Button shows profile pictures of the user's friends who have already signed up for your site in addition to a login button.
Registration - The registration plugin allows users to easily sign up for your website with their Facebook account.
Facepile - The Facepile plugin displays the Facebook profile pictures of users who have liked your page or have signed up for your site.
Live Stream - The Live Stream plugin lets your users share activity and comments in real-time as they interact during a live event.