Mimir is a virtual mentorship platform that offers personalized advice and lessons on spirituality, personal growth, and mindfulness. Users can choose from a list of AI personalities, such as Sadhguru and Osho, to gain insights and guidance. The AI mentors ask relevant questions based on the user's queries to provide better advice. Mimir aims to provide an accessible and affordable way for individuals to find good mentors without the need for extensive networking or high costs.