What is Subaru Starlink, as it pertains to the Subcription?

What is Starlink? I know that name pertains to a lot of different things but I want to know what the subscription supplies. The Starlink subscription for one of my Outbacks is about to end and I want to know if it's worth it to renew. Will the MySubaru app still function without a Starlink subscription?

I rarely find myself using any "Starlink" specific apps but I do like the remote start from phone, remote lock and info displayed on the MySubaru app. What if any functionality will I lose there if I fail to renew?