Too Long; Didn't Read
Kusama is designed to be a platform for experimentation, allowing developers to try out new ideas in a live environment. Kusama uses the same system architecture as Polkadot, which makes it a suitable testing ground for new features and functionality before they are integrated into the main network. The native currency of the Kusama network is KSM, which is used to staking, paying transaction fees, and voting on governance proposals. The most common error you'll encounter is an "invalid account index" error.