Most SEO statistics pages recycle the same figures from other pages. These are different: every number below comes from our own studies, with the method and the data behind it. Last updated with data checked in October 2026.
Old domains and authority
- 96% of 224 aged domains (median age 22.4 years) had a Semrush Authority Score of 2 or less. Study
- The highest Authority Score among all 224 was 6 out of 100. Study
- All but one of those domains still had referring domains, with a median of 251. Study
- Domain age and referring domains had a rank correlation of only 0.09. Study
- 6% of the domains (14 of 224) were showing someone else's website because their DNS pointed at reassigned hosting IPs. Study
Expired domains
- 30% of 37 expired domains we traced were registered again by someone else. Study
- 26 of the 37 were still unregistered at the audit. Study
Keyword difficulty and search volume
- 58% of 483 researched keywords had a Semrush keyword difficulty under 30. Study
- 36% of keywords with 10,000 or more monthly U.S. searches still scored under 30. Study
- Search volume and keyword difficulty had a rank correlation of 0.42. Study
Using these figures
You are welcome to quote any figure here with a link to the study it comes from. Each study has a CSV of its aggregate data. Please keep the limits in mind: our samples are real but small, and they are not random samples of the web.