Facebook App Id For Business Page. Steps to add apps to your business manager: You may need your business id when you share access to information such as monthly invoices or a facebook pixel.
If you also want to sell on instagram, select your instagram business account. Find your facebook app id. • create, schedule and manage posts from a single app, so you can share with more people at once
Get the page's instagram business account.
Create a business manager account; Small to large businesses use business manager to organize their business assets and information in one place. Note down the app id. You will need your unique app id when you're using analytics, or creating ads in the audience network.