What is highlighted in red in the hover data when a resource exceeds a specific threshold?

When a resource exceeds a specific threshold in Dynatrace, the significant metric that is highlighted in red within the hover data is the compression data. This visual cue indicates that the compression has not met expected performance standards, suggesting potential issues that could affect load times and user experience.

Monitoring compression data is crucial because it reflects how effectively resources, like images and scripts, are being compressed before they are sent to the browser. Proper compression can significantly reduce the amount of data transferred over the network, directly impacting loading speed and overall website performance. If the compression data is highlighted in red, it signals to users that there may be an actionable performance issue that needs addressing, such as re-evaluating compression settings or optimizing resource sizes.

Focusing on the other options, network latency is a separate performance metric that pertains to the delay in communication between assets and servers, while resource type and load order help categorize and sequence assets but do not specifically indicate a problem when a threshold is exceeded. Hence, the highlighting of compression data serves as a critical indicator for performance optimization in web resources.