👉 The word "plugin" in this context is a tool, typically for software development or website optimization. It refers to specific components that help improve website functionality, such as plugins for SEO or plugins for mobile responsiveness. Definition: A plugin is a module or component included with an application that adds new features, fixes bugs, or makes it more efficient and easier to use. Plugins can be used to enhance existing software, add new features, or replace existing components of the system.