Your niche will set you apart from your competition. To compete online, you must have a niche. Your niche should be what you specialize at providing your clients, customers, or visitors.
Your niche could be that you offer free delivery. Your niche could be that you offer a lower price. Your niche could be that your product achieves results faster. Your niche could be that you've been in business for a longer period of time than your competitors. Your niche could be that your product tastes, smells, sounds, looks, or feels better. Your niche could be your product is light or compact. Your niche could be that you've won a business reward. Your niche could be that your product lasts longer. Your niche could be that your product is easy to use. You niche could be that your product has better safety features. Your niche could be that your product is made by hand. Your niche could be that you stand behind all your products with a guarantee
What separates you from any other website/business? There are millions of websites, you must establish a "specialty", or niche, that you are confident in providing. Doing so will increase traffic to your website and establish a standard of excellence for you to maintain.