4.6. Customer Groups
Use "Customer Groups" to create a "Group" of selected Customers, based on specified criteria. Subsequent available functionality includes options, such as setting specific prices for the resulting Customer Group(s).
Once it has been created, you may assign Customers to your Group.
Once a Customer is assigned to a Group, you may perform operations, such as specifying product pricing, available only to that particular Group.
To access "Customer Groups", go to the Store tab -> Products - > Group Price.
You may now allocate and set special pricing for specific Customer Groups.
Please, check for the useful articles here:
What is Magento Customer Group Price? How to Import Group Prices in Magento?