How to get Facebook APP ID

To obtain a Facebook APP ID, it is necessary to first create an app on the ‘Facebook for Developers’ platform. Please follow the below steps:

• Log into your Facebook Account
• Create a new App by moving to the URL  https://developers.facebook.com/apps
• Click “Create App.”

Enter App Details, then click Next.

• Enter your App Name.
• Enter a Contact Email Address.

Select Use Cases for your app.

• Choose one or more use cases,
  OR select the option “Create app without a use case.”

Business Connection

• Choose which business portfolio you want to connect to this app,
  OR select “Don’t want to connect a business portfolio yet.”

Requirements

• Your app may need to complete certain requirements (like App Review) to access specific data, depending on the use cases you selected.
• Click “Next.”
• Your app will be created.

Go to your App Dashboard and copy your App ID.

For detailed instructions, you can refer to Facebook’s official page:
https://developers.facebook.com/docs/development/create-an-app