DB with cross zone replications and HA for starter.

Does HA mean failover or does it mean multi–master?

It means high availability.

Do you know what that means? If you don't know what it means, how do you know you need it?

I see you are trolling, bye

I'm understanding that you have no idea what high availability means, you only know that you need it and the cloud has it. Great marketing by the cloud.