Click:
The activities involving Mouse Automation are used to replicate any mouse input that is performed routinely by a human, such as single-click/double-click, right-click or Move actions. 

How to use Click Activity?
1.    Open a project.
2.    Search for Click from Mouse Automation and drag and drop it to the workflow.
3.    Double click on the activity.
4.    You can enter the Window title or Select screen on option and select the application from the list.
5.    Select the function from the drop-down to perform.

When to use this activity
Scenarios where it is required to perform Click/Right-click/Double-click/Hold/Release for interacting with applications.

Technical Reference: