Peer learning, also known as peer-to-peer learning or shared learning, is the process of peers learning with and from each other. It is achieved by engaging learners in experiences together or providing opportunities for them to share insights with one another.

Advantages of peer learning include:

Accelerated learning
Gain new perspectives
Practice and reflection
Build networks
Develop comradery
Build accountability
Strengthen reasoning skills
Create feedback loops
Increase engagement
Improve communication skills

​reference 

https://instructionaldesign.com.au/peer-learning-shared-learning/