Gutenberg is the new block-based editor being developed for WordPress that aims to improve the editing experience. It allows content to be organized using blocks, providing a more visual layout. The need arose from limitations in the classic editor, such as difficulties aligning images and text. Gutenberg's block-based approach aims to make content creation simpler and more focused. The editor has progressed from an initial plugin to being integrated into WordPress core. Future plans include expanding blocks beyond posts to other areas like widgets and menus.