Ad Fraud Detection
The Dead Internet Problem: What 51% Non-Human Traffic Means for Brand Advertisers
For the first time, most of the internet isn't human. Impression-billed media has no idea.
By Will Harnden ·
In short: automated bots and agents now generate 51% of all web traffic — and impression-billed advertising has no way to tell them from real people.
In 2025, automated traffic crossed a line it had been approaching for years: bots and other non-human agents now account for 51% of all web traffic (Imperva, 2025 Bad Bot Report). Bad bots alone make up 37%. For the first time in a decade, the internet is majority machine.
Why now
The cause is the AI boom. Generative models have made bots cheap to build and easy to scale, while a wave of AI agents and scrapers crawls the web constantly. Some of this traffic is benign; much of it is not. Either way, it lands on the same ad slots your brand is paying for.
Why it’s a brand-advertising problem, not just a security one
Most digital media is billed per impression, and an impression is simply an ad being served — not an ad being seen by a person. The billing model cannot tell a customer from a crawler. So as the non-human share rises, the share of your budget spent on nobody rises with it, silently.
The knock-on effects are worse than the wasted spend. Bot traffic pollutes your analytics, inflates “reach”, distorts A/B tests and trains your optimisation algorithms to chase machines. You end up spending more to reach the audiences that convert least.
What to do about it
You can’t opt out of the dead-internet problem, but you can refuse to pay for it. The answer is to verify delivery at the device level — serving only to devices shown to be live with a real person — and to measure campaigns on verified human reach rather than raw impressions. In a majority-machine internet, “was it served?” is the wrong question. “Did a person see it?” is the only one that counts.
None of this is cause for despair; it’s a reason to change the unit of account. Brands that keep buying raw impressions in a majority-machine internet are, in effect, helping to fund the bots. Brands that buy verified human attention turn exactly the same budget into real reach — and stop subsidising the problem they’re complaining about.
Sources: Imperva 2025 Bad Bot Report.