It is the plural of sponsor. Is the one who performs the action of sponsor, not to be confused with sponsor. It is a gift or warranty requested to companies or institutions to deliver to the participants or attendees to an event and thus give greater importance or relevance to it. It is a way to promote brand awareness through the distribution of its products free of charge for organizers throughout a day, Congress or given event.
* Only one "like" per meaning and day, the more "likes" the meaning will appear higher in the list