Do probiotics really help dogs with itching/grass eating?

Hey everyone, quick question about probiotics for dogs.

I was at the pet store recently and the guy there asked if I was giving my dog probiotics like it was a must-have. Got me wondering if I’m missing something.

My dog sometimes licks his paws, scratches a bit, and eats grass occasionally. Nothing extreme, but enough to notice.

Has anyone here actually seen a real difference after adding probiotics? Did it help with skin issues or digestion? Or is it more of a “nice to have” than necessary?

Would love to hear your experiences!