Full Site Editing (FSE) is a feature in WordPress that allows you to design and customize your entire website directly from the WordPress block editor. This includes the ability to edit the header, footer, and sidebar, as well as create custom page templates and design elements.
FSE allows you to build and design your website in a more intuitive and visually appealing way, without the need for code or complex design tools. It also allows for greater control and flexibility in the design process, as you can easily make changes and preview them in real-time.
Overall, Full Site Editing is a powerful tool for WordPress if want to take your website design to the next level, and create a fully customized and professional-looking website without the need for coding or design skills.