Track multiple domain names in the same website within Matomo

Just a video explaining what you should do in order to track multiple domain name within the same entity in Matomo Analytics. with setDomains and enableCrossDomainLinking function.

[timlavagi]

Hi Ronan, I was wondering how I can track an event using Matomo tag manager. Specifically, I need to track which user bought what and for what price. I have already found out that everything is in a form and when this form is sent out I can trigger it. What I cannot do is take the variable of how much money has been transfered inside the form. How can I pick out that variable?