About the VTA Alignment
VTA (vertical tracking angle) refers to the angle formed by the record surface and the line from the stylus (in the groove) to the cantilever pivot point. Incorrect VTA can lead to uneven stylus wear and potential damage to your records over time.
The thickness of a record can also alter the VTA slightly. Thicker records (e.g., 180-gram vinyl) may require slightly different tonearm settings than thinner records. This also applies to phono cartridges, which may vary significantly in height. Some tonearms are equipped with a dedicated VTA or tonearm height adjustment dial that makes changes quick and easy. This is helpful if you frequently switch between records of different thicknesses or cartridges of different sizes.

About the Azimuth Alignment
Azimuth refers to the angle of the stylus when viewed from the front, specifically whether the stylus is exactly vertical and symmetrical as it sits in the record groove. Proper azimuth alignment ensures that the stylus is equidistant from both walls of the record groove, which is important for proper stereo imaging, equal channel balance, and minimal distortion. Misaligned azimuth can cause uneven wear on your records and stylus, potentially damaging both over time.