On the app, you can check your holiday balance, directly on the home screen, and get the details.
After checking your balance, you can then click "request time off". You will be able to select the type of time off you want to request (paid or unpaid) and then select the start and end date, as well as add a note to your manager.
Before validating your request, you will be able to verify the information and check your request against your balance before sending the request to your manager. Your request will then appear as "pending".
Once approved, you should receive a push notification and see your holiday request as "accepted" and it will also reflect on your schedule.