WebVR allows virtual reality experiences to be built for web browsers using WebGL and the WebVR API. It combines immersive VR with the openness and accessibility of the web without requiring downloads. WebVR applications can be independent experiences or part of larger virtual worlds on the web. The document demonstrates WebVR by linking to demo sites like MozVR and Mobic Autoconstruction's VR configurator. Resources listed include WebVR browser builds, libraries like THREE.js, demo applications, and information on the WebVR API.