Blinkist is a subscription-based service that provides key insights and summaries of non-fiction books in a concise format. This service allows users to read or listen to shortened versions of books, known as 'blinks,' which capture the main ideas and concepts. It is designed for people who want to understand the core message of a book in a short amount of time. Subscribers have access to a vast library of book summaries across various categories like business, self-development, health, and more.