can any one help me for understand this program

general
,
1

#include <stdio.h>
void chat(char *text)
{
text = text + 3;
return;
}
int main(void)
{
char *text_msg;
text_msg = “HELLO,How are you???”;
chat (text_msg);
printf (“Chat Message = %s \n”, text_msg);
return 0;
}