Is Coinbase 29.99 fee?

Excuse me, I'm a bit confused about the fees associated with Coinbase. I've heard some people mention a 29.99 fee, but I'm not sure if that's accurate. Could you please clarify if Coinbase charges a 29.99 fee, and if so, what does that fee cover? I'm interested in using Coinbase for my cryptocurrency transactions, but I want to make sure I understand all the costs involved before I proceed. Thank you for your help.