This block makes sure that a process is executed a given number of times, repeatedly. It doesn’t do anything specific by itself.
You should put other action/control blocks inside in order to create a pattern.
Drag and drop Repeat inside a workflow where a green field appears. Doing so makes it a part of the workflow.
Enter the number of Repetitions.
Run the workflow to see the effect applied.
The resulting structure will repeat the block you have inserted.
To disable a Repeat block without deleting it, use the slider on the left of its name.