Magnesium is an essential mineral, especially if you are a heavy sweater or you are following a low carb lifestyle.
Essential for muscle function bone health and nervous system thus you may benefit from supplementation.

Common symptoms of magnesium deficiencies may include:
cramping
excessive head sweating
restless legs
muscle aches
anxiety
depression
muscle pain

Here is a smplified way to remember the forms and function.
Malate = Muscle
Glycinate= Good sleep
Citrate= Calming
Oxide= Overrated (poor absorbtion)
Taurate, Orotate= Ticker cardiovascular health