The T2 Instances are intended to give the ability to burst to a higher performance whenever the workload demands it and also provide a moderate baseline performance to the CPU.

The T2 instances are General Purpose instance types and are low in cost as well. They are usually used wherever workloads do not consistently or often use the CPU.

https://aws.amazon.com/ec2/instance-types/t2/#:~:text=T2%20instances%20are%20Burstable%20Performance,Credits%20when%20they%20are%20active.