The purpose of the SEO tool Ahrefs is to help improve a website's search engine rankings. Ahrefs provides detailed insights into backlinks, which are crucial for SEO. It allows you to analyze competitor websites to understand their strategies. You can use it for keyword research to find high-ranking keywords that will drive traffic. Ahrefs also offers site audit features that help identify technical SEO issues on your website. It tracks your website's ranking progress over time and suggests improvements. Overall, Ahrefs is designed to help you boost your site's visibility, traffic, and rankings on search engines.