What is the plug-in of the computer for?

Plug-ins are used to realize some extended functions of the program.

Plug-ins (also called addin, add-in, addon or add-on) are programs written according to certain standard application program interfaces. It can only run under the system platform specified by the program (possibly supporting multiple platforms at the same time), and cannot run independently without the specified platform. Because plug-ins need to call the function library or data provided by the original pure system. Many softwares have plug-ins, and there are countless types of plug-ins.

The orientation of plug-ins is to develop programs and realize the functions that the original pure system platform and application software platform do not have. They can only run under the system platform specified by the program (possibly supporting multiple platforms at the same time), and cannot run independently without the specified platform. Because plug-ins need to call the function library or data provided by the original pure system.