Definition:
Rename Method is the easiest refactoring, which simply involves finding all calls to the particular method, then renaming them as well as the method itself.
Triggers:
the intent of the method is not clear
the method's body is not coherent with the name
the method does more or less than the name implies
Forces:
readability: longer names may reveal intent or may be too noisy, while short names may not explain enough
sole intent: the name should capture all that the method does (at a given level of abstraction); if not, we may need to perform other refactoring (e.g., extract method) to keep it clean