Social learning refers to a theoretical approach to the study of Behavior that is interested in both overt behaviors and the role of possible cognitive mediators that may influence such behaviors directly or indirectly.
Other /More definition:
Social learning refers to the acquisition of social information and behavior; situations in which one individual comes to behave similarly to others.

Moreover, Social learning is a theoretical approach to the study of behavior that is interested in both overt behaviors and the role of possible cognitive mediators that may influence such behaviors directly or indirectly.