If you could let us in on the context, it’ll make it easier to comment further on it.
The sentence is just a tagline for the project. So it would appear alone on top of the website, next to a graphic of people with their hands raised. The community refers to the community of people building websites, and the standards are the World Wide Web Consortium’s HTML standards. “Demands” could also be replaced by something meaning “wants”, “needs”, or “must have to survive”. Does that clarify a little?