What It Is: Companies like Google and Yahoo give you information to search for, and you tell them how closely their results matched what you were looking for. Does a search for Lady Antebellum turn up sites about the music group or links to pre-Civil War period information? If you are Latina, for example, you might be asked to search the way a Spanish speaker might perform a search in English.
Spelt is definitely the way it is spelled and pronounced in Britain. My daughter reads and watches many British books, shows, and movies, and she spells and pronounces it that way because she has become so accustomed to it. She had one English teacher criticize her until she showed said teacher that it is the British way to spell it. She also says (and spells) “learnt” instead of “learned.” Being an Anglophile myself, I have no problem with it. It is not incorrect. Americans changed English. If anything, we’re the ones who mispronounce words!
These little jobs are done by people who log on to a company’s site and choose tasks, which could be as simple as clicking a link. Amazon's Mechanical Turk is one of the most well-known sites of this type. Also, there are crowdsourcing projects, which are similar to data entry, where companies engage an army of virtual workers to each do one small part of a larger project.