If you want to have your Facebook Page embedded on your website on the sidebar, following these steps using their plugin.
Make sure your Facebook Page url is correct. Mine automatically populated but if you manage more than one page, you’ll want to check this.
Now you can check or uncheck items you don’t want to be displayed in your feed.
Click get code
Click on Iframe
Select the code and copy (right click copy)
Open your WordPress website and click Widgets under Appearance
Using an HTML Text box, drag it to where you want your plugin to be displayed.
Enter the code you copied from Facebook.
Note, I had to change the capital T to a lowercase t in the word allowTransparency before it would save.