Final answer:
There are four Great Fairy Fountains in Breath of the Wild, which can upgrade the player's armor. Additionally, there is a fifth fairy, the Horse God, with a distinct function.
Step-by-step explanation:
In The Legend of Zelda: Breath of the Wild, a highly acclaimed action-adventure game, there are a total of four Great Fairy Fountains. These fountains are scattered across the vast landscape of Hyrule. Each fountain is home to a Great Fairy who can upgrade the player's armor in exchange for in-game currency, provided the player has the necessary materials.
The four Great Fairy Fountains are located near Kakariko Village, Tabantha Frontier, near Gerudo Desert, and in Akkala. Finding and activating all the Great Fairy Fountains is beneficial as it allows for maximum upgrades to your armor, enhancing Link's abilities significantly.
It is essential to note that there is also a fifth fairy, the Horse God, which is similar in appearance to the Great Fairies but serves a different purpose -- reviving horses that have fallen in battle.