Ahrefs is SEO company that offers various premium and free SEO services. Some of the services offered by Ahrefs are: domain comparison, website authority checker, youtube keyword tool, SERP checker, Site audit, content explorer, etc. While free tools have a limitation, the premium service is really expensive. For a small and medium size website owners paying $99 per month for SEO services may not be possible. In that case, you can use Ahrefs SEO Toolbar. This tool bar is completely free and available as extension for Chrome and Firefox. By using this toolbar, you can do SEO analysis for every site you visit. The toolbar will give you information on on-page SEO, SERP position, SEO metrics, word count, broken links, organic traffic search, etc.
Since the toolbar contains a lot of metrics, it might slower your browser.
Since the toolbar contains a lot of metrics, it might slower your browser.