When you skip an employee from the payroll, it means that they won't receive payment for that particular payroll period. Skipping an employee from payroll has a one-time effect, for that particular payroll only.
If you need to skip the same employee in future payroll runs, you will have to repeat the process of skipping them again for each subsequent payroll period.
To skip an employee from Payroll,
1. Click on Run Payroll
2. Select the employee(s) you want to skip
3. Click on "Skip/Unskip payroll"
To undo this action, you can re-select the employee(s) and click on the "Skip/Unskip payroll" again.