Solid is a platform, built using the existing web. It gives every user a choice about where data is stored, which specific people and groups can access select elements, and which apps you use. It ...

As for Berners-Lee, he calls Solid “the third layer of the web,” following the original, static web pages of the 1990s and the more interactive, app-like experiences that have followed.

Obviously, remaking the Web to better serve users won’t happen overnight. Berners-Lee has taken a sabbatical from other work to focus on Solid, considering it of paramount importance.