TL;DR: Vaadin was hardly SEO-friendly in the past. Not anymore, with the new Volga library. Bookmarking pages Bookmarking is as old as www itself. Being able to save an URL is part of the ADN of websites. Regarding web apps, this is somewhat different. For example, in an e-commerce webapp, while it does make sense to bookmark a specific product, bookmarking a specific step of the checkout process does not.