Tracking app installs - conversions for marketing

Hi, everybody!
My question may seem strange to some, but I hope I either find an answer or someone can point me in the right direction. I’m not a developer, but I am a marketer. :pray:

My question relates to those who host their apps on Atlassian’s marketplace. How do you track conversions?
Let’s say you have some advertising, in any channel. People click on the link, but you can’t track their actions on the marketplace page, right? After all, you can’t install any code into the marketplace site.
How do you understand from which channel the conversions came to the Marketplace side? And that it’s exactly them?

I would welcome any help, thanks for your time and attention!

After all, you can’t install any code into the marketplace site.
You can install GA id into the marketplace site (in app detail settings)

settings screenshot:
image

Great! we’ve got that set up and Google ID’s put in those lines.
Where exactly in Analytics do you look at conversions and how do you understand which channels they came from?