In a few words, Masonic Etiquette is a code of recommended rules and suggestions; however, we have to understand that these rules and suggestions are not laws, such as the Grand Lodges regulations, or Edicts of the Grand Master.
It is good to apply Masonic Etiquette in the Masonic life, maybe much more in the profane one, in order to honor the Order, because the Mason, especially outside the Lodge, is the mirror of the Masonic Fraternity.