To start an online sweepstakes business, first, research the legal requirements in your jurisdiction, as regulations can vary significantly. Next, choose a niche that appeals to your target audience and develop an engaging website to host your sweepstakes. When considering how to start an online sweepstakes business, focus on creating attractive prizes and effective marketing strategies to attract participants. Finally, utilize social media and email marketing to promote your sweepstakes, ensuring you build a loyal customer base while adhering to all legal guidelines.