Authority Score (AS) is a metric, provided by SEMRush, that grades the overall quality of a website. The score is based on a 100 point scale and uses different variables such as the number of backlinks you have to calculate the score. Their score is gaining more trust over other authority metrics because it factors organic search data and website traffic.
The best way to improve this score is to check the errors on our auditor first. Another key element to improving your score is to limit toxic backlinks, create earned backlinks through quality content, and consider securing relevant niche links to your website. As your keyword rankings increase, your Authority Score should as well.