Short Answer: The main focus of Whole30 is to teach you to have a healthy relationship with food long term, embrace healthy eating, and determine what foods make you feel great and which foods to avoid that make you feel bad. The program also wants you to be aware of all the ingredients in your food, and avoid all highly processed foods. The main focus of Keto (also known as the ketogenic diet) is to eat a high-fat, moderate protein, low-carb diet to get your body into ketosis, which is when your body begins burning body fat for fuel rather than carbs/sugar. Long Answer: If you want to learn more about Whole30, I've got a whole post on Everything You Need To Know About Whole30. I also highly recommend all the Whole30 Books to learn the official program rules and the reasons behind them. To learn more about Keto, I learned a ton from this podcast episode, this book, and this book.