The difference between giveaway and sweepstakes primarily lies in how winners are selected and the requirements for entry. A giveaway typically involves participants entering for a chance to win a prize, often requiring minimal action, like following a social media account. In contrast, sweepstakes usually require participants to submit an entry form and may involve a random drawing to select winners. Understanding the difference between giveaway and sweepstakes is essential for both organizers and participants to ensure compliance with legal regulations and to set clear expectations for the contest.