A link wheel is nothing more than backlinks pointing to your site. Visually each backlink is like a wheel spoke connecting to your site which is at the center. And each backlink also connects to each other as well. Nowadays, with SEO and backlink building, it's good to keep backlink building random.
Link wheel is a widely used internet marketing strategy. The basic idea of link wheels is to create a pattern of links which flow from one website to another which would finally link to a targeted website requiring promotion.
Link wheels fall under the category of search engine optimization, however, when social media sites are used to create the link flow the link wheel strategy becomes social media marketing. According to experts, link wheels have maximum effectiveness when the social media sites are used.