You're up and running - here's what you're looking at.
Total Subscribers
Everyone who's shown interest in your page. We capture email addresses before someone pays, so this number grows faster than paid subscrubiers. These are warm leads you can bring across to paid membership over time.
Paid Subscribers
Your members - the people paying for access. This is your most important number.
MRR (Monthly Recurring Revenue)
It's your predictable monthly income from memberships. If this is going up, your business is going up. It is how much you would expect to earn on average each month based on your total paid subscriber base. The actual amount earned each can vary due to different billing cycles
ARR (Annual Recurring Revenue)
This is your MRR annualised (effectively MRR * 12). It's how much you should earn over a year with your current subscriber base.
That's the basics of your subscription business. If you want dive deeper, head to Analytics and check out this article on analytics too.