Sonar is a tool for code quality that provides value to all stakeholders in a development group by showing only relevant information in a certain context, shutting off the noise to facilitate investigation and decision making. To customize Sonar, users can create filters to choose components and metrics to report on, build their own widgets and dashboards, select default dashboards displayed, use notification services, and more. Creating a filter allows users to save and update criteria for retrieving components and measures, while building a dashboard enables the creation of custom quality indicators for projects or global views. Users can also choose default dashboards displayed globally and project-wise, subscribe to notifications, and receive regular quality reports via email. By customizing Sonar, developers can maximize value in their tool and tailor it to their specific needs.