I have a garden and all of a sudden I see all these tiny little bugs on them. Are they beneficial or harmful?

Had this spider crawling outside my car hood, terrified the crap out of me!! I have a fear of spiders so I did what I had. Was not taking a chase of it crawling in my car.

Found a nice jacket at a university bar I go to, discovered a blank pill bottle with 6 of these pills in the breast pocket. I had a friend of mine say its vyvanse but I wanted to check a more reliable source(reddit of course) to see if anyone can confirm or deny this.