Positioning Is Context
Positioning is how customers perceive your product relative to the alternatives — the context that answers, instantly: what is this, who is it for, and why should they care? Get it right and the value is obvious. Get it wrong and even a great product looks confusing or irrelevant.
Positioning is not messaging or branding
Messaging is the words on the page; branding is the look and feel. Positioning is the strategic decision underneath both — which market you're in, who you're for, and what you're better at. Messaging expresses positioning; it can't fix bad positioning. If people don't understand what you are, prettier copy won't save you.
Quick check
A product is technically excellent, but prospects keep saying "I don't really get what this is or who it's for." What's the gap?