This document summarizes Icinga Web 2, an open source monitoring web interface. Some key points: - Icinga Web 2 was developed from scratch in PHP and jQuery to be lightweight, fast, and usable on any device. - It features role-based access control, supports Icinga 1.x and 2.x, and has a basic API. - Upcoming versions will improve search views, add quick actions, integrate with Graphite and business process modules, and expand the API.