Facebook fanpage is needed for every website because by adding the Facebook fan page to your blog it will give more exposure in social media. When you share any interesting posts about your blog on Facebook then the users will be able to view who liked your fan page. So by adding this Facebook likebox the users who visit your website will connect through social media I mean they like your fan page when you place this like box on your blog.
Steps To Add Facebook Like Box To Blogger
First go to this and enter your Facebook page url.
Enter the width and height which perfectly matches your blog as shown in the screen shot. You can also choose whether to hide the cover photo or to show the friends faces and also you can hide or show the posts which are posted by you on Facebook fan page. In tabs section you can also select the timeline which displays the recently updated posts by the fanpage and you can also select the messages and events which is updated by the fan page because by selecting this tabs option you can view other things like events, messages, timeline etc which is new feature added by the Facebook.
My recommendation is for best view you should not select the show page posts and also leave the tabs section because when Facebook fan page is added to your blog your blog speed loads slow compare to regular speed of your blog. After selecting all the options sucessfully now click get code option and your like box code will popup as shown in the below figure.