potions are made in brewing stands with blaze powder as fuel can be very complecated to make!
one special potion is the potion of weakness, this turns zombie villagers in the villagers so you can get cheaper trades!
Here'sthe recipie for potions:
all mtypes of potions
by adding gunpowder in the brewing stand, you can make them projectiles splash potions, and if you add dragons breath you can make it a lingering potions