I'm very confused with these like T30...T50 schools like ppl ask me where I got in and if it's a T20, 30, 50, 100 and I say idk?

It's not Harvard or Ivy but a good MD school and I didn't care to know what # it is when I was applying. I tried searching online cause so many ppl talk about it and genuinely have no idea where this med school rank is coming from