The wiki is currently a work in progress. If you'd like to help out, please check the Community Portal and our getting started guide. Also, check out our sister project on poewiki.net.
Item socket
Item sockets are slots found on equipment such as armours or martial weapons into which certain items can be placed.
Mechanics
Item sockets can hold runes or soul cores, which add an enchantment to the item. Both runes and soul cores grant offensive modifiers to martial weapons and defensive modifiers to armour. Once socketed, runes and soul cores cannot be removed.
Sockets can be increased through the use of an 
Artificer's Orb. Body armours and two-handed weapons can have up to 2 maximum sockets, while other types of armour and martial weapons can have up to 1. Some unique items have additional sockets beyond the normal limit.
An additional item socket can also be added as result of corruption, such as using a 
Vaal Orb, bypassing the usual limit.
