Facebook, I like and share

To share your website on Facebook, you can use the Social block in several different ways:

• You can add a Like button: in the AddThis tab, make sure to select Facebook. The Like button is displayed if you check Show sharing number under Likes and Tweets. You can choose a small or a big button style.
• You can add a Share button: if you disable the number of shares, a button will be displayed, which opens a window for sharing your website.
  
• You can add a Facebook badge: in the Facebook tab, this mode allows you to create a badge to promote your Facebook page on your website (and not directly your website this time).
  

Lastly, you can also use Facebook button plugin: https://developers.facebook.com/docs/reference/plugins/like/. You only need to paste the Iframe code in a Widget HTML block (by disabling isolation mode).