Alexa and SEMrush provide estimations about the traffic a domain receives.
Since all of them have different ways to measure it's good to have them all. SEMRushRank is a rank similar to Alexa rank, while SEMRushPrice and SEMRushTraffic are indicators for the actual dollar value of the traffic based on the rankings a domain has. This is thereby also a quality indicator - the higher the better.
|Alexa||Alexa Traffic Rank.|
|SEMRushRank||Rating of a page by the number of visitors that come from the first 20 Google search results.|
|SEMRushPrice||Estimation of the costs of purchasing the same number of visitors.|
|SEMRushTraffic||Number of visitors coming from the first 20 Google search results per month.|