The Simple Loss Formula
When a landing page is down, every click is paid for and cannot convert. The loss is therefore trivial to compute: hourly click spend × hours undetected. A campaign spending €240 a day spends €10 an hour. If the page breaks and you find out 30 hours later, it cost you €300. If you find out within an hour, €10. Same failure, thirty times the price.
This is not a statistic or a survey estimate. It is the arithmetic of your own campaign: plug in your own daily spend and your own reaction times.
Detection Delay by Checking Method
The average detection delay is half the interval between checks; the worst case is the full interval. Here is how common approaches look for a campaign spending €10 per hour:
| Checking method | Worst case | Max loss (at €10/hr) |
|---|---|---|
| Manual, once a week | 168 hours | 1 680 € |
| Manual, once a day | 24 hours | 240 € |
| Automated, every hour | 1 hour | 10 € |
And one more factor stacks on top: pages do not break while you are at your desk. They break overnight during automatic CMS updates, on weekends when a new site version ships, and during holidays. Exactly when your manual check is furthest away.
Why Meta Will Not Solve This for You
Meta reviews ads at approval, not continuously while they run. A broken landing page does not stop the ad, and the budget keeps spending. Responsibility for a working destination URL sits with the advertiser. That is not a criticism; with millions of advertisers it is an understandable choice, but it means the checking is your job.
Manual Checking Does Not Scale
Checking one URL takes half a minute. An agency managing 20 accounts with dozens of ads in each would need hours for one honest round of checks, every day, weekends included. Which is why in practice it does not happen, and problems surface randomly: from reports, from a metrics drop, or from an angry client's email.
This is exactly the category of work that belongs to a machine. 404Watcher checks the URLs of all active ads every hour, distinguishes 404s, server errors and SSL problems, and emails you the ad and campaign name when it finds one. Average detection delay drops to 30 minutes regardless of whether you are asleep, off for the weekend or on holiday.
How much shorter the worst-case detection is with hourly checks versus a weekly manual check.
Key Takeaways
- Loss = hourly spend × hours undetected. Check frequency is the only variable you control.
- Pages break outside working hours, exactly when manual checking is weakest.
- Hourly automated checks cap the worst case at one hour of budget. There is no cheaper way to cut losses in paid advertising.