Crafting an item in a specific style requires a Style Material. Weapons and Armor can be crafted in a variety of styles.
Other styles exist in the game, but are limited, unavailable or yet to be released. Outfit styles are usually obtained during in-game Events.
Motifs are typically used in conjunction with Crafting Writs. Crafting armor or weapons in a particular style requires certain skills and ingredients.
Styles can be categorised into two types, however both can be used to customise the appearance of your character via the Outfit System. There are numerous styles available to wear in Elder Scrolls Online.