Go back to ACRank. ACRank shows that how important a particular page is by assigning an integer value from 0 (lowest) to 15 (highest) depending on number of unique referring external short domains. The scale is almost logarithmic (to the base 2), but not exactly. See this table:Notes:
- You may notice that 1 domain is specified for rank 1 and 2 - this is because Rank 1 will be given only if there is a single external backlink, where as Rank 2 will be given if there is more than one external link but they all come from single external domain. This is done to split off some of the more valuable Rank 1 pages that would otherwise be mixed up together. (Source)
- The ACRank value does not depend on the ACRank values of pages that link to the page, which means that weight of backlinks is not taken into account.
ACRank is created by majestic SEO to measure the value of websites. You can see on majestic SEO’s page that how many 1..15 ACRank sites refers to your website.