The Page Timeout value (for Application Monitoring services) and the URL Timeout value (for Website Monitoring services) define the total time in seconds allowed to successfully load a single page. For example, when the value is set to 30 seconds, a timeout error is automatically generated if the total load time for any page exceeds 30 seconds.
Fullpage services have an additional Image/Object Timeout value, which defines the maximum time in seconds for an image or page object to load.
Depending on your service's settings, surpassing any of these timeout values could result in a strike or error being logged and an alert message sent out.
If you receive an alert message regarding a timeout value being exceeded, you may need to adjust your timeout settings. You may also wish to investigate a particular page or object if it consistently exceeds the timeout value that has been set.