<prompt> Translate the following text to SwahiliOn the other hand, advertising mail is narrowly defined as First-Class stand-alone advertising mail, i.e., First-Class Mail used exclusively for advertising.  <response>: Kwa upande mwingine, barua ya matangazo ni narrowly kufafanuliwa kama Kwanza-Class kusimama peke yake matangazo ya barua, yaani, Kwanza-Class Mail kutumika peke kwa ajili ya matangazo. 