Ahrefs is a software company that develops online SEO tools and free educational materials for marketing professionals. Ahrefs crawls the web, stores tons of data and makes it easily accessible via a simple user interface. Those data can be used to aid keyword research, link building, content marketing and SEO strategies. Ultimately, the tool helps to accelerate the growth of organic search traffic to a website. Ahrefs specializes in big data, keyword analytics and research, deep link analysis, competitive analysis, online reputation management, site audit, search engine analysis, internet marketing, baclink analysis, SEO, organic research and so on.