A meaningful share of paid advertising clicks come from automated traffic — not malicious fraud necessarily, but crawlers, scrapers, and monitoring tools that were never going to buy anything.
When those clicks are counted the same as a real visitor, cost-per-acquisition numbers quietly inflate and budget gets allocated toward campaigns that look more effective than they are.
Separating bot clicks from genuine intent, in real time, at the server, is the only way to see the true return on a campaign before the invoice arrives.