How to receive alt airdrop?

For those new to the cryptocurrency world, the concept of alt airdrops can be quite intriguing. Could you elaborate on the steps involved in receiving alt airdrops? I understand that it typically involves holding a certain amount of a particular cryptocurrency in a wallet, but are there any specific requirements or procedures that need to be followed? Additionally, are there any risks associated with participating in alt airdrops? Clarifying these details would greatly assist individuals looking to expand their holdings through this unique opportunity.