To set up the Facebook Widget box in your WordPress website, you need to follow these steps to create your APP ID and install the widget on your website.
Facebook Widget Box In WordPress
Go to https://developers.facebook.com/
- Click on My Apps Button
- Now Click on Create App button.
- Now Select an App type if you have a website Go to Business.
- Now Provide basic information of Business Display name & App contact email.
- Lastly, Click on Create App, Copy App ID, and paste it into your widget area.
I hope after following all these above steps, you could easily manage to set up Fb widget code on your website. Let me know in the comment section if you have any difficulties while setup Facebook App ID on your website.