Why use local() if initially the browser itself checks whether the client has this font?

Question

Fonts

Why use local () if initially the browser itself checks whether the client has this font and then, if not, it looks for a suitable format for itself?

@font-face {
  font-family: MyGentium;
  src: local(Gentium Bold),    /* full font name */
       local(Gentium-Bold),    /* Postscript name */
       url(GentiumBold.woff);  /* otherwise, download it */
  font-weight: bold;
}

Or am I misunderstanding something?

Answer 1

ostensibly for IE, don't worry,
the main thing is to upload fonts to a local server, and not to load according to counters from other sites