Does Coinbase work worldwide?

I'm curious to know if Coinbase operates globally. Can users from any country access and utilize its services, or are there certain restrictions in place? It would be great to get a clear understanding of Coinbase's reach and the potential limitations for international users. Additionally, if there are any specific regions or countries where Coinbase is not available, I'd appreciate if you could highlight those as well. Thank you for your help in clarifying this matter.