A Backlink is a hyperlink that is located on an external resource and leads to the promoted site. The accumulation of a high-quality link environment is one of the most important factors necessary for successful website promotion in search engines. There are two main types of backlinks: natural and purchased.
Natural backlinks - These links are placed on sites where user-generated content is present. Most often, these sites are social networks and forums. In these cases, links are placed by users as a recommendation (for commercial sites) or to confirm information (for information and news portals). Typically, such links are unincorporated and are URLs copied into the text. Links that the webmaster manually places on their site on the resources mentioned above, where their presence is natural and justified, can also be considered natural.
Purchased backlinks - Hyperlinks of this type are purposefully purchased from site owners (donors). These links can be temporary - in this case, they are put down for a specified period (usually a month) and can be extended subject to the payment of the next period. There are also so-called "eternal" backlinks - those that are more expensive but are purchased once and for all.
Backlinks affect search engine promotion in two main ways. The first is "pumping" site parameters such as TIC and PR. The second is an increase in the number of clicks on the links provided, which leads to traffic to the site and helps to improve behavioral factors.