Gutenberg is the new block-based editor introduced in WordPress 5.0. With Gutenberg, content is created using blocks, which can be easily moved, rearranged, and customized to create a unique layout. This new editor provides a more intuitive and flexible way to create content, making it easier for users to design their pages exactly how they want them.

While Gutenberg comes with a variety of built-in blocks, developers can also create custom blocks to add additional functionality to the editor. Custom blocks can be used to create anything from simple text or image blocks to more complex elements like sliders, galleries, or contact forms. With custom blocks, you can create a truly unique and personalized editing experience for your users.