What is the significance of Karel's "turnLeft();" command?

The "turnLeft();" command is significant because it enables Karel to change its movement direction. When Karel executes this command, it rotates 90 degrees to the left, which alters its current facing direction. This capability is crucial for navigating the environment, allowing Karel to maneuver around obstacles, follow pathways, or perform tasks that require a change in orientation. The command does not change Karel's current task or reset its orientation, but rather provides a means to adjust how Karel interacts with its surroundings.