How do I claim flare on MetaMask?

Could you please elaborate on the process of claiming flare tokens on MetaMask? I'm a bit unfamiliar with the steps involved and would appreciate a step-by-step guide. Could you also explain what MetaMask is, and why it's necessary for claiming flare? Additionally, are there any specific requirements or prerequisites that I need to fulfill before attempting to claim flare? Finally, is there a fee associated with the claiming process, and if so, how much is it? Thank you for your assistance.