RTO or Recovery Time Objective is the maximum time your business or organization is willing to wait for a recovery to complete in the wake of an outage. On the other hand, RPO or Recovery Point Objective is the maximum amount of data loss your company is willing to accept as measured in time.

https://aws.amazon.com/blogs/mt/validating-and-improving-the-rto-and-rpo-using-aws-resilience-hub/#:~:text=Resiliency%20can%20be%20defined%20in,that%20your%20application%20can%20tolerate.