What signifies a webpage that can be reused and applied across multiple pages?

A template is a predefined structure or layout designed to provide a consistent appearance and functionality across multiple web pages. It usually includes common elements, such as header, footer, navigation menus, and styles that ensure uniformity. This approach allows web developers to create new pages quickly by filling in the specific content while maintaining the overall design and functionality established by the template.

Templates are particularly useful in content management systems (CMS) and website builders, as they enable non-technical users to create and manage web content easily. They save time and effort by eliminating the need to recreate common elements for each page, thereby streamlining the design process and improving maintainability.

The other options, while related to web development, do not convey the same idea of reusability across multiple pages in the same way that a template does. Modules, for instance, often refer to specific pieces of functionality or reusable components within a web application, but they may not imply an entire page structure. Layout typically refers to the arrangement of visual elements, and design encompasses broader concepts associated with aesthetics and usability rather than reusable structures.