Within Settings > My Business, edit the staff member's record to set their commission percentages for appointments and product sales (if enabled):

Upon saving, it will be indicated against their record:

If a product is sold on its own (i.e. without an appointment) and you want to record commission against a staff member, tap [Edit] on the sale record:

Followed by [Record commission] to select the staff member:

Once a staff member's commission is set up, within Reports > Commission, you can view the calculated totals for bookings/products/both based on the configured percentages - example with 50% commission:

Note that the system does not auto-allocate commission amounts to the staff's bank account. If online or in-store card payments are enabled, the paid amounts go in full to the staff's designated merchant account as configured within Settings > Online Payments > [Settings]:

The shop manager should use the Commission report to determine how much to manually allocate (e.g. via bank transfer), and operate this on their own schedule (e.g. weekly, monthly).