VCs want to see your product demo. The earlier stage you are, and the less metrics you have the more important this is. If you are growth stage, no one cares. You have numbers. Early stage your product demo shows you have actually shipped something. This is important. It’s the ultimate show don’t tell (Check it out vs trust me we can code good). So if you do a demo in person, what needs to be in your deck? You need to have a product slide in your deck, but you want to keep things on your product simple. What I do is a slide which shows the ‘4 things it does’…. the key ones anyway. You just want to explain it at a high level so an investor gets the core and want a meeting to learn more. You can demo in a meeting… once you get one. You are going to share your deck before a meeting (most of the time) so a simple overview of your product is a very good idea. You can see slide examples here: https://perfectpitchdeck.com/custom-pitch-deck-examples/  You can read the blog here:  https://www.alexanderjarvis.com/2018/10/12/how-to-do-a-demo-in-a-venture-capital-pitch/