Usage & privacy
We use Vercel Web Analytics to understand which courses and games people visit and try. It reports page views, device types and approximate countries, plus fixed actions such as opening a chapter or checking an exercise.
We do not send your code, answers, notes, uploaded files or notebook contents. Activity events contain only predefined course, chapter, game or challenge labels. Page addresses have their query strings and fragments removed. We do not use advertising cookies or session recordings.
These counts help us improve the site. They do not certify learning or identify who completed a course. Browser settings and content blockers can prevent collection.
You can turn off analytics for this site in this browser. Each domain has its own setting.
Turn off analytics · Turn analytics back on
We also respect Do Not Track and Global Privacy Control. With either enabled, collection stays off.