You can see them next to the profile picture of every user. It doesnt matter whether youre using Zoosk from your desktop or you have the app, they both have the same system. Its pretty simple. A green dot next to someones name means that the user is currently active.

What does it mean when someone viewed you on Zoosk?

Views is a special feature that allows you to know who has viewed you. This is a particularly fun and useful feature because it gives you the opportunity to flirt with Zooskers who checked you out, but were maybe just a bit too shy to say hello right away.