I'm looking into creating a specific product in the pet space. I've done some prototyping and gotten feedback in person. I'm trying to gauge interest with a landing page and low cost FB ad campaign features a short 11 second video ad of the prototype. I'm not selling on the landing page, I'm collecting emails for product updates. What should I be looking at here to gauge product interest? Right now I'm thinking of comparing my CTR to this as a benchmark. Current CTR is 2-3% but with a small sample size. CPC ads will not be the way that I distribute the product eventually, so I'm not looking at viability of the ad campaign itself.