The multishot enchantment will cause a ranged weapon to fire two projectiles with every shot, effectively doubling its potential damage output.
This is an excellent question because you’re referring to the “multishot” enchant that can be found in Minecraft. It’s important to note that the “multishot” enchant does not actually change how many projectiles are fired upon firing your bow or crossbow; it only changes how many arrows (or bolts) per individual projectile released from those weapons 1-3 arrows/bolts per projectile are common numbers when this enchantment is active. The increased DPS generation associated with this attribute of the multishot enchant reflects an increase in average damage dealt against enemies over time because of its ability to generate more hits and kill mobs more quickly, but it does not actually increase the number of projectiles.
The multishot enchant is available as a random drop from a mob or can be obtained using an enchanting table.
That should give you a basic understanding of the multishot enchantment and how it works in Minecraft!