The main use case for v0 right now is building all the UI screens that I generally develop for freelancing work. The clients that I deal with on a regular basis usually come up with requests for portfolio websites, booking websites, traveling websites, and similar projects. I generally come to v0 with designs that I create in Figma, take a screenshot of the reference, and ask v0 to build it. v0 comes back with beautiful designs and a prototype of a working UI.
Once v0 provides a beautiful design and working UI prototype, I deploy it and host it live, then give an initial call with all the clients to test it out and get their hands dirty with the product before I actually integrate the backend with the UI that v0 has generated. Post that call, once they feel very happy about it, I start integrating the backend. The main use case is to rapidly prototype applications, deploy them, and host them live.
I also use v0 in my workflow to prototype a lot of things that I keep track of on a regular basis. Prototyping all the things that I have in mind and getting things into a live environment takes a lot of time. I use v0 as a quick support to build rapid prototypes in parallel, deploy them, and host them live. I give my friends and expected end users the ability to make their hands dirty with the product, get feedback instantly, and then build on top of it. v0 is helpful because the rapid prototype and rapid UI that I build in very little time gives me an added advantage to play around with customers and get instant feedback, so I can probably work on it and improve my backend services after that.