Moz rank is offered by moz and show the page value on search engines. This count from 0.00 to 9.99 higher rank is better its depending on backlinks of the page and the quality of the website. Website with many backlinks which link back to your website give highly value of moz rank.
MozRank displays link popularity. It shows the importance of any website on the Internet. It is based on numbers of backlink and quality of these backlinks. Websites with higher MozRank are likely to rank higher in Google search result page.