A 0–100 score developed by Moz that predicts how well a domain will rank in Google search results, based on Moz's index of links and a machine-learning model trained against Google SERPs. Often abbreviated DA. It is not a Google metric — Google has stated repeatedly that there is no internal "domain authority" score. DA is useful as a third-party comparison: a relative score for backlink-profile strength versus other domains in Moz's index. Often misused as if it were Google's own ranking input.