Adjusting a piano is a process that requires a skilled technician to ensure the instrument is in tune and playing correctly. Tuning a piano involves adjusting the tension of the strings, which can be done by turning the tuning pins located at the back of the instrument. This process is known as 'tuning' and is necessary to keep the instrument sounding its best. Adjusting a piano also includes making minor repairs and adjustments to the action and other components of the instrument. The end result is a piano that is in tune and playing optimally.