The most valuable styles of backlinks come from great web sites. Links from websites which are recognized as top authoritative assets will ship more positive signals to search engines than hyperlinks from low-first-class, lesser-known web sites.
To decide the authority of a domain (and the cost of a hyperlink), study the linking web page’s Alexa Rank. The higher (i.E., lower) the Alexa Rank of the linking web site, the better the link is for search engine marketing. Sites with a low Alexa Rank are greater authoritative than web sites with a excessive Alexa Rank. You can take a look at a site’s Alexa Rank the use of Alexa’s Site Overview device.
Here is the List :