The most real-world demo is the Gatsby Wikipedia example which Addy Osmani demonstrated on Google I/O. You can find it here at https://guess-gatsby-wikipedia-demo.firebaseapp.com/. You can toggle link highlighting by pressing "h". Red links are very likely to be visited, orange/yellow ones have mild probability, and green ones are unlikely. The highlighting is based on the model that Guess.js builds from the Google Analytics report.