How do Coinbase rewards work?

Could you please elaborate on how Coinbase rewards function for users? Specifically, I'm curious about the mechanisms behind earning these rewards, whether they are based on transactions, holdings, or other activities. Additionally, I'd like to know if there are any specific conditions or requirements to be eligible for these rewards, such as maintaining a minimum balance or completing certain tasks. Understanding the details of Coinbase's reward system would help me determine if it's a viable option for me to consider. Thank you for your assistance in clarifying this matter.