Crowdsourcing is a method of engaging a ‘crowd’ or group for a common goal — often innovation, problem solving, or efficiency. If survey panels connect you with people willing to answer questions, these platforms connect you to people who are willing to do stuff.
That might be going to a supermarket and taking a picture of a toothpaste promotion. Or mystery shopping a takeaway restaurant. Or checking if a range of cosmetics are actually available in store.
It might be a really simple question that a handful of photos will help with (‘where do people keep their tea in a typical home?’); or it could be a national audit of your retail distribution.