Are you confused by some of the SEO metrics and abbreviated column headers you see in Ahrefs? This article is for you. In the 3+ years that I’ve been with Ahrefs, I’ve seen many seasoned SEOs overwhelmed by the sheer quantity of data they see inside our tools. So if you’re new to SEO, it’s perfectly normal to feel lost. That’s what our learning materials are here for. Now, here’s the good news: These SEO metrics aren’t as frightening as you might think. They’re quite easy to understand. Here’s the list of metrics that I’m going to cover in this article: But before I explain what each of these SEO metrics means.

After all none of these

Metrics would exist without it. The big data behind Ahrefs’ SEO metrics We’re known for making great SEO tools that help digital marketing professionals excel at executive data their jobs. But here at Ahrefs, we like to think of ourselves as a “data-first” company. Here’s why: We crawl the web 24/7, collecting petabytes of data in the process. We develop custom storage solutions to host all that data. We create ways to efficiently query that data and extract insights in a fraction of a second. Here are just a few core numbers, representing the scale of Ahrefs’ infrastructure: Developing a bot that crawls the web and stores web pages on your hard drive might sound like an easy thing to do. But crawling the web at the rate of 200 MILLION pages per hour is a different ball game altogether.

The same is true

For storing all this data in a way that allows for THOUSANDS of Ahrefs’ SEO customers to make calls to a database and have all their graphs and reports built out in My Numbers List seconds. That’s why we built the majority of our backend infrastructure ourselves. All existing solutions couldn’t keep up with the volume of data we operate or, if they could, were too expensive. As of today, we’re running a big custom database with around 85 TRILLION rows. Furthermore, according to a recent third-party study of the “most active good bots,” Ahrefs boasts the second most active crawler after Google, outperforming Bing, Yahoo, Yandex, Baidu, and everyone in between.