A good niche in affiliate marketing should have a clear audience and enough demand to make sales. It's important to choose a topic people are interested in, like fitness, tech, or personal finance, where they're already searching for solutions. The niche shouldn't be too broad, like "health," but specific, like "home workouts for beginners." This helps you target the right people. Also, check if there are affiliate programs with good products or services in that niche. A great niche has low competition but still enough interest to drive traffic. Researching keywords can show you what people are searching for and how hard it is to rank. Passion for the niche can help you stay motivated, but it's not a must if the market is strong. What ideas do you have for picking a niche?