What chains are supported by Coinbase?

Could you elaborate on the cryptocurrency chains that are currently supported by Coinbase? As a leading cryptocurrency platform, Coinbase undoubtedly offers its users a wide range of options, but I'm curious about the specific chains they cater to. Are the major blockchains like Ethereum and Bitcoin included? Or do they also extend their support to other emerging and lesser-known chains? This information would be highly valuable for investors and traders alike who are considering using Coinbase for their cryptocurrency transactions.