Final Fantasy VII Tips

Materia Growth
You may notice that sometime during the game, you'll eventually come across a couple weapons for your Party Members that when you equip them, have the words "Double" or "Triple" underneath.
This means that when you equip Materia to the Weapon, the Materia will grow 2/3x's it's normal rate when you win in any battle. This is great for wanting to aquire higher level Magic Spells through the course of the game.