The While activity is a Control Flow activity that enables the developer to execute a specified part of the automation while a condition is met. The condition is evaluated before the loop body is executed, which means that the developer can assess the value of a counter or any other variable before performing the actions inside the loop. This type of activity can be useful to iterate through an array, a list, a data table, or any other collection of data, or to repeat an action until a certain value is reached or changed. The While activity can be found in the Activities panel, under Workflow > Control.
References:
While - UiPath Activities
While Activity - UiPath Studio
UiPath While Loop Tutorial with Examples - RPA Tutorial