What does void(*)() mean in code

What does void(*)() mean in code

I saw this code today in some fb profile, and was not able to understand
what is and how this is working:-
(*(void(*)()) shellcode)()
Can someone please explain me, what does above code mean ?
Full Code Snippet Below :-
#include <stdio.h>
#include <string.h>
char *shellcode = "\x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69"
"\x6e\x89\xe3\x50\x53\x89\xe1\xb0\x0b\xcd\x80";
int main(void)
{
fprintf(stdout,"Length: %d\n",strlen(shellcode));
(*(void(*)()) shellcode)();
return 0;
}
Thanks