Request a Call Back form allows customer to fill their details such as

Name
Phone Number
Best time to call
Message

Customer can fill this form and it will be mailed to the the store owner
The store owner can call back with the solution of the query raised by the customer
This functionality allows customer to add a form
This form can be added at any page wherever required
It allows the customer to interact with the owner
The messages are managed efficiently at the back-end
All the fields are mandatory to get the desired output