You should choose a niche within the online gambling industry. Popular options include slots poker or sports betting. Next, you must select a domain name that reflects your niche. You can then find reliable web hosting to get your site online. After that, you should create quality content that attracts visitors. Reviews and guides about different casinos work well. You can join affiliate programs from reputable online casinos. Promote their links on your site to earn commissions. Focus on SEO to improve your site's visibility over time.