Video Details

In this edition of Whiteboard Friday, Rand goes through and defines many of the metrics we are used to seeing. Rand also has a few suggestions about how to use them most effectively.

Open Site Explorer/Linkscape

  • mozRank – analogous to Google’s PageRank. This scale is logarithmic, meaning it’s more difficult to get from 5 to 6 than 2 to 3.

  • mozTrust – similar to mozRank, but it only calculates links from trusted sites.

  • Domain mozRank and Domain mozTrust – the same as mozRank and mozTrust, but on the domain level.

  • Number of links (followed/external/internal).

  • Number of linking root domains – rather than individual pages linking to you, the number of whole domains linking.

  • Number of c-blocks – the number of links from various c-blocks of IP addresses.

  • Page Authority – a number from 0-100 that predicts how well a page will rank based on link metrics.

  • Domain Authority – the same as page authority, but on a domain level.


  • PageRank – PageRank calculated internally by the search engine. Keep in mind the Toolbar PageRank is only updated every 3-9 months. It also correlates closely with mozRank.

  • Homepage PageRank – also called Site PR, it is the PageRank of the homepage. Remember that it isn’t necessarily a good predictor for the rest of the pages in the site.

  • Number of links (Google) – use to find the number of links to your site, though this will not be the entire number of links as the engines don’t want to give all the link information they have. You will find a more accurate count in Google Webmaster Tools.

  • Number of links (Yahoo!) – you can find this through site explorer and yahoo index in some countries.

Majestic SEO

  • Number of links – raw number of links pointing to the site.

  • Number of referring domains – same as linking root domains.

  • Number of external backlinks – the link that point to the site that are not internal links.

  • Number of IPs – the number of unique IP addresses linking to the site.

  • Number of class-C subnets – the same as linking c-blocks.