Donors are websites that, through links posted on them, transfer part of their static weight other “neglected” target resources in it.

The name of this term came from the English-language concept of “link juice "-" reference juice. If we draw an analogy with blood transfusion, then the donor is the one who gives part of his “bodily juice” acceptor, to which he is vital. The same thing happens with static weight (“reference juice”) - sites donors pass on your weight acceptor sites.

Transmitted page weight the site is distributed equally between all links posted on it.

Weight transfer is needed by the acceptors to improve their position in search results. Therefore, for each SEO-promoted website, there is a large number of high-quality authoritative donors are one of the key factors that are considered by search engines when ranking.

Search for donors and placement on them backlinks carried out independently by viewing relatives by subject websites and contact with their owners. Or most often optimizers resort to services link exchange, acting as intermediaries between donors and acceptors.