The problem with this question is that there is a ton of stuff you need to understand before you can really answer that question fully. To know what public means, you need to understand classes, and visibility rules for classes. To understand static fully, you kind of need to know how c++ works, since it's equivalent to a bare function in a namespace. Void is the type of the return, which means it doesn't have so that's pretty straight-forward. Main is the name of the function that gets run when you run the program, which kind of requires knowledge of program entry points (assembly) either that or the understanding of what a library is. The simplest thing you can say is that it's boilerplate to signify what function gets run when the program starts, but that doesn't really explain any of the pieces.