I have read it is a natural backlink, which is alone in one site from the same niche as linked page, isn't it? But if I get one link from a site of my page niche, do I need to link this page? What I mean, for example I get a backlink from cars.car to my bmw.car page. Must I create link on my page bmw.car to cars.car to establish a deep-link? Please tell more about. Thanks in advance!