Is Gate.io free to use?

Excuse me, I was wondering if you could clarify something for me about Gate.io. I've been hearing a lot about this cryptocurrency exchange platform and I'm curious if it's free to use. Do I need to pay any fees or charges to trade or hold my digital assets on Gate.io? Or are there any hidden costs that I should be aware of? I'd appreciate it if you could provide some insight into this matter. Thank you in advance for your help.