Link down monitoring opens every destination a link can send visitors to — its default URL, every targeting rule's destination, and every A/B test or Choice Page option — and emails you when one stops working: a 404, a server error or a timeout.
It checks the page, not the product. An Amazon page that loads fine while its product is out of stock won't trigger this. For that, use product availability checks.
Choosing which links are monitored
Each plan monitors a set number of links, checked at a set frequency (see plan comparison). Open Monitoring in the account menu to pick which links count. New links are monitored automatically until you reach your limit; as soon as you turn a link on or off yourself, you're in charge and new links are only monitored if you turn them on. Switch to automatic hands the choice back to us.
You can also turn monitoring on or off from any link's targeting page, where the Monitoring card shows every destination's last result and the next check. Check now rechecks a monitored link immediately, a limited number of times per hour.
Why a link isn't checked the moment you switch it on
Every link has its own fixed check time. Switching a link on doesn't trigger an instant check; the first one happens at its scheduled time, shown as Next check. This keeps the schedule fair for everyone.
No false alarms
A single failed check isn't treated as an outage, since sites occasionally rate-limit or hiccup. A link is flagged down, and you're emailed once, only after a second failed check in a row. If your plan drops to a lower limit, the extra links stop being checked and the rest keep going.