The Jamstack is often described as a "decoupling" of the UI from the backend, where the work of generating views happens at build time on a build server, rather than as a response to each request made by the browser. This approach is in contrast to a "coupled" architecture, where the server is responsible for generating the view that gets sent to the browser, and updates are driven by active code being run. The decoupling allows for faster and more efficient rendering of views, while also making it easier to manage and maintain complex applications.