The Test Team works to improve WordPress quality and usability by advancing the development process through manual and automated testing. Whether through a browser, app, terminal, or code, the team focuses on testing across the entire WordPress ecosystem, including CoreCore Core is the set of software required to run WordPress. The Core Development Team builds WordPress. and GutenbergGutenberg The Gutenberg project is the new Editor Interface for WordPress. The editor improves the process and experience of creating new content, making writing rich content much simpler. It uses ‘blocks’ to add richness rather than shortcodes, custom HTML etc.
https://wordpress.org/gutenberg/, mobile apps and themes, and feature plugins and importers.