I need someone way smarter or more experienced than me

I’m usually pretty good at finding answers in the FAQs, but I’m really confused about this one. I’m trying to figure out if I have to pay for a checked bag. My ticket says “United Economy” does that mean I’m in the clear, or not? I do have a basic MileagePlus account with United, I’m sorry if it’s a dumb question but it’s been a while since I last booked a flight and just reading the baggage info wasn’t really helpful.