Facebook Page tabs are a great way to show your content or promotions right inside Facebook. Here's how to do just that:
Go to your app's dashboard
Pick which app you want to publish on Facebook and go to its dashboard.
Publish your app
You need to make the app publicly accessible. Click Publish.
Go to the Integrations page and pick Facebook
Look at the left menu and go to the Integrations section. Every integration available is listed there. Click on the Facebook logo.
Sign in with a Facebook Profile
Click Connect with Facebook. You'll be prompted by Facebook to sign in and then to authorize our app to manage your Facebook Pages. We'll only make use of your permissions to install and remove tabs from your Pages. Nothing more, nothing less.
After you've gone through the permissions, your Facebook Profile's name will show up as signed in. Now click Continue.
Choose a Facebook Page
Pick a Facebook Page from the drop-down menu and click Install tab.
Your app is now installed and visible as a Facebook Page tab. Click on the Page's name to go right to the tab, or click Uninstall to remove the tab and pick another page.