The main functionality of mass actions is to carry out specific actions using multiple selected items. This makes it easy for the admin to perform mass actions on the selected items. It can be a time-saver for the admin. Magento 2 admin grid means huge amount of records in maintained and helps carry out mass action on various records. If the mass action facility is available for admin grid, there is no need for individual or separate record operation. For example, if custom mass action is used to upgrade the customer group of selected customers. The solution is to add dynamic mass action in admin grid in Magento 2.