What's the difference between Luna & the old Luna token?

Could you please explain the key differences between Luna and the old Luna token? Are there any notable changes in terms of functionality, value, or purpose? How do these differences affect investors and users of the platform? Additionally, how does the transition from the old Luna token to the new one work, and what steps should users take to ensure a smooth transition? Understanding these aspects would greatly help those who are new to the platform or are considering investing in Luna.