In Real-time we use this.
Relative Time: The timer task can start the timer from the start timer of the timer task, the start time of the workflow or worklet, or from the start time of the parent workflow.
Relative Mode
A timer task is mainly used for scheduling workflow.
Workflow 11 AM --> Timer (11:05 AM) --> Absolute Mode
Anytime workflow start after 5 mins Timer --> (5 mins) will start Relative Mode.