Final answer:
An admin can track company progress on Trailhead in the "Company Progress" section of their Trailhead Dashboard, not via email, the company's website, or the mobile app.
Step-by-step explanation:
An admin can track their company's progress on Trailhead in the "Company Progress" section of their Trailhead Dashboard. This specialized area provides various tools and insights that allow admins to monitor and report on the learning progression of their team members. Viewing progress is a key component to understanding where a company's workforce stands in their learning journey and identifying areas where further training might be needed. Trailhead does not send detailed progress reports through email notifications, nor is the company's official website the source for this data. While the Trailhead mobile app is a useful tool for individual learners, it does not specifically provide an admin view for company-wide progress tracking.