To charge an item, just select it in the inventory and press the T key, the item will be filled based on the capacity of the soul gem. Soul gems will play a significant role if your character wears heavily enchanted armor and weapons, because without them you can forget about powerful features, so you should constantly monitor the presence of charged soul gems and constantly replenish their supply.
If the armor is not bewitched, and you want to add enchantment to it, then soul gems are one of the main ingredients that are necessary for this. The soul that rests in the gem will fill the level of spells partially or completely, it all depends on the gem, what size soul it holds inside. When the magic effect is exhausted, it is necessary to replenish the level of magic in the ammunition, by means of a special object, and soul gems will serve as this means of reloading. In the world of Skyrim, there are charms that are superimposed on armor or weapons, but such charms are not durable and eventually cease to give their effect.
