In a round of golf, you can get free relief and change your "lie" in some scenarios. For example, if your ball is plugged in the fairway, sitting on a cart path, or resting against a man-made structure like a water fountain. In other cases, you must "play it as it lies", which means you cannot touch the ball or change how it sits. In the majority of golf shots, you will "play it as it lies".
Be an honest golfer and play it as it lies!