When Should People Start Pitching Angels?

There's a difference between when d you start pitching angels and maybe when you start reaching ut to m investors. In terms of pitching angels, m terms that you might have heard of are a kind of preceed and seed m and so seed rounds for b to c companies. So your job as a start up founder is to how do you demonstrate that people will buy it, even if they haven't bought it yet? Yeu'll be helpful.