How to get Optimism airdrop?

Could you please explain how to obtain the Optimism airdrop? I'm quite interested in this topic and would appreciate a detailed description of the steps involved. Is there a specific prerequisite or requirement that needs to be met? Also, how does the airdrop work? Are there any limitations or conditions that I should be aware of? Could you clarify the timeline for this airdrop and whether it's still available? Finally, is there a risk involved in participating in this airdrop, and how can I ensure my safety? Thank you for your assistance.