It is important to know your niche.
Remember at high school, how difficult it was to hang out with the wrong crowd and make them like you? Well, it’s kind of like that when your marketing your business online.
Art is a business too, so when you are creating, think of your niche and don’t run around the school trying to impress everyone that you know.
People outside your niche might not be interested in who you are and what you are doing; to be honest they might even hate you; BUT that’s okay because you were never trying to satisfy them in the first place.
Yes, you can have more than one niche, but the more niches you have the more difficulty you will have in marketing your business.
I know this for a fact because with Seven Sentences I target several niches and the progresses has been slower because of this.