General questions about Magento 2, not specific to a minor version. Use this tag to distinguish from Magento 1. If you have issues with a specific version, please use the appropriate 'magento-2.x' tag instead. Functionalities between Magento 2 minor versions might differ.
Magento 2 is the latest ecommerce software by Magento. It differs from the previous version of Magento substantially and brings more and more possibilities and features with a complete ecosystem surrounding it.
Main Magento website: https://magento.com/
Official Magento 2 Documentation: http://devdocs.magento.com/
Official Magento 2 GitHub: https://github.com/magento/magento2