Rocket is a lightweight static site generator that emphasizes simplicity and performance. It avoids unnecessary tools and frontend frameworks, defaults to zero JavaScript, and offers automatic code splitting and filesystem-based routing for fast development.
A template or theme refers to a pre-designed layout or structure that provides a basic framework for building a specific type of application or website. It typically includes good design, placeholder content and functional features, allowing developers to customize and fill in the details according to their specific needs.