Ahrefs

Ahrefs is one of the most popular commercial SEO tools, used to analyze backlink profiles, research keywords, monitor competitors, and audit the technical health of sites. The platform relies on its own web crawler, which builds one of the largest link databases on the internet.

How Ahrefs works

The core of Ahrefs is its backlink index. The tool shows which pages link to a given site, with what anchor text and what strength. To rate value it uses proprietary metrics: Domain Rating (DR) scores the link strength of a whole domain, while URL Rating (UR) scores a single URL. Beyond link analysis, Ahrefs offers keyword exploration with estimated volume and difficulty, analysis of competitors' organic visibility, and a Site Audit module that detects indexing, redirect, and performance issues.

Ahrefs in practice

SEO specialists use Ahrefs at many stages of work on a site's visibility. When planning link building, they analyze competitors' backlink profiles to find valuable link sources. When creating content, they research keywords and topic gaps. A technical audit helps surface problems that hurt rankings, such as broken redirects or orphan pages. In daily work Ahrefs is often complemented by crawlers such as Screaming Frog for deep technical analysis and by Google Search Console data, which shows real queries and clicks. Keep in mind that metrics like DR and estimated organic traffic are Ahrefs' own signals rather than official Google figures, so treat them as a trend indicator, not an absolute value. Regular monitoring of the link profile and visibility also lets you catch the loss of valuable backlinks or a drop in rankings early and respond before it affects traffic.