Well, this is a dependable question. Articles or content is a major section of niche sites because your article reflects your service or review. Standard niche sites need at least 5-10 unique articles on relevant keywords. 20-30 articles on a niche site are the best move recently. But there are many niche sites that contain more than 100 articles. If your niche site finds any new topic that makes a profit or privileges, you can create more and more articles onwards.