To import reviews from a review site you can use the following steps
Visit the plugin page and select "profiles" and then "Add New"
Name your Profile and then select "Choose A Reviews Site"
From the drop-down select the site you would like to configure
Next input your profile slug and if you want check the URL to make sure it goes to your Facebook reviews page
Then check the box to "scrape for reviews now" and select submit
You should then see "active" as the status for your profile