Step 2 - Log in to Intercom, and look up Shopitag in the app store
Login to the Intercom system, and click in the left menu on the App Store icon. This will open up the marketplace of Intercom, containing an overview of all the integrations they have available with third party systems. Some of these external apps can be installed right from their app store, some have to be installed starting from the third party platform. For the Shopitag to Intercom link, this can be installed starting from Intercom.
There's a search bar at the top of the marketplace, simply fill in Shopitag and 1 result will show.