The difference between contest and sweepstakes lies primarily in the method of entry and the criteria for winning. In a contest, participants compete based on skill or creativity, with winners selected based on their performance or submissions. Conversely, sweepstakes are games of chance where winners are chosen randomly from all entries, often requiring no purchase or skill. Understanding the difference between contest and sweepstakes is essential for participants, as it influences how they engage and what they can expect in terms of effort and potential rewards.