What is a plug-in?

A plug-in is a program that enhances or extends the capabilities of a host application, allowing users to take advantage of additional features or functionalities without modifying the core software itself. This modular approach enables a more flexible and customizable experience, as users can choose which plug-ins they want to install based on their needs and preferences.

In many software environments, such as web browsers, graphic design software, or digital audio workstations, plug-ins are commonly used to introduce new tools, effects, or integrations that improve the overall functionality of the primary application. For instance, in web browsers, plug-ins might allow for playing videos or enhancing security, while in design software, they could offer advanced image-editing capabilities.

Other answer choices refer to distinct concepts; a standalone application is independent and functions without relying on other software. A hardware component pertains to physical parts of a computer or device, which does not fit the definition of a plug-in. A type of operating system refers to the fundamental software that manages hardware and software resources, which is also different from the plug-in concept.