Google Tag Manager
To set up collection using Google Tag Manager (GTM), you firstly need to retrieve the GTM container for each domain from which you are planning to collect events. This can only be done after your domains have been initialised and validated. Once this is done, you will receive the option to download the GTM container for all validated domains.
The downloaded file already contains all of the information needed to set up GTM collection. All you need to do is import the downloaded container into your workspace.