turntable tonearm anti-skating adjustment

The anti-skating adjustment of a record players tone arm is important for an accurate, well balanced reproduction of the vinyl record.

Anti-skating: What´s it for? How does it works? How to adjust it properly?

ViperFrank´s tutorial:

cassette, vinyl, records, cassette culture, hiss, groove, tape hiss, groove noise, cassette, hissandgroove, hiss and groove