m0useanswered grow question 2y ago They're a Predator, They will eat other bugs trying to make a meal or resting on your plant.
I don't like spiders but they get the job done. They like to make nests in the leaves and you may find one pulled together with a silk hiding spot.
Spidermites on the other hand, really small ones, are a pest and super hard to kill. Spiders don't eat spidermites as they are to small.
Good Luck!