Google Analytics UTM setting up

Hello everyone, I’m going to use Google Analytics to check traffic through UTM metrics. And as I know I must to integrate utm metrics into URL and track visitors.

For example:" mysite+analitycUTMmetric"… But How does it works if network create THEIR own macros, than what? Should I still submit " mysite+analitycUTMmetric" or just “mysite"?
If” Mysite" only, than how can I make sure that network provides reliable info? And - Will Google analytics - read such network’s macros? If yes, what order should they be written by? Is there any special? Thanks