What's good about 黄道益 (Wood Lock) and 云南白落?

A relative recently recommended (Wood Lock) as an easily available substitute to Dit Da Jeow. The ingredients listed are Camphor, Methyl Salicylate, Menthol and Turpentine Oil. I’d like to know what the ingredients are good for, and what ailments people often use Wood Lock for.

They also recommended for when you’re really fatigued from heavy training. What is it, and what are the ingredients in it good for?

I greatly appreciate any insight you can afford.