What is the function of a plugin in software applications?

A plugin serves to enhance a software application by adding specific features or functionality that the original software may not include. This modular approach allows users to customize their software experience based on their unique needs and preferences. For instance, in web browsers, plugins can enable additional capabilities such as ad blocking or video streaming, while in design software, they might facilitate new tools for image editing or effects.

The other options represent different functions that are not directly related to the core purpose of a plugin. Executing scripts for automation refers more to task automation tools rather than plugins themselves. Securing user data transmission relates to encryption and security protocols, and hosting applications typically involves server infrastructure rather than the addition of features within a software application.