People who use online art shops (i.e. Zazzle, Teespring, Redbubble), what do you do to drive traffic to your storefronts? [x-post r/passive_income]

I personally use Redbubble, and outside of a few posts I've made on Reddit, I have no real idea how to get any clicks to my site. I make around $30 a month based just on people seeing my works when searching tags, but nothing I have up there has over 150 views. Does anyone have any strategies on how to bump those numbers up and start making a few more sales?