Have a look at the usefulness of plugin host

A plugin plays an extremely significant role in producing music. In the digital music softwares, they perform copious functions which may be for artistic or creative purposes and even used for performing engineering functions. However, in order to use the power of plugin for all these purposes, you first need to have the plugin host. Basically, it is a group of software elements which offer certain features to a bigger software application. Further, one can also customize a number of functions of the application with the use of plugins. Apart from all this, they are also used to scan viruses, play videos etc.