Piwik, now known as Matomo, is an open-source web analytics platform that helps website owners track and analyze their visitors' behavior. It provides insights into how users interact with a site, including page views, bounce rates, and conversion rates. This information is valuable for improving website performance and enhancing user experience. One of the key features of Piwik is its focus on data privacy. Unlike many other analytics tools, it allows users to host their own data, giving them full control over their information. This makes it a popular choice for businesses and organizations that prioritize user privacy and compliance with regulations like GDPR.