Step 1：Register as a Facebook Developer
Log in to your Facebook account and go to https://developers.facebook.com/apps.Then click the "Register as a Developer" button and follow the Facebook instructions to finish the registration (you will be asked to confirm your account via phone/text or by registering with a credit card).
Step 2: Create a new Facebook App
Go to https://developers.facebook.com/apps. Click the "+Create New App" button and then follow Facebook instructions to create an app. You’ll be asked to choose a display name (such as “Podcast Comments”) and you can choose a category (“Apps for pages”). Once done, you will be directed to the next page.
Step3: Get the App ID
After you complete the couple items above you will be shown the App ID. You can copy this ID for use in step 4 (you can ignore all the settings and other details shown here).
Step 5: Moderate and Manage Facebook comments
Step 4: Link your Facebook App ID with your Podbean account
Log into your Podbean account. Go to "Settings"-> Comments" page, then enter the Facebook App ID you copied from the app you created.
Go to http://developers.facebook.com/tools/comments.You can moderate and manage all comments by clicking the name of the App you created.