How much ETH do you need to stake?

Excuse me, could you please enlighten me on the amount of ETH required for staking? I'm a bit unclear on the specifics and would appreciate it if you could break it down for me. Is there a minimum threshold that needs to be met? Or does it depend on the platform or staking method chosen? Additionally, are there any associated costs or fees that I should be aware of? Your insights would greatly assist me in making an informed decision. Thank you in advance for your time and assistance.