Select a check function. Check functions are scripts that take streaming telemetry as an input, check the data based on its logic and on the supplied arguments and outputs a health state. Some may check a metric stream for a threshold, some for spikes, others will a text contained in the event, etc. Each check function requires different arguments. If you want to know what a check function does exactly or want to create your own check function then you can find a full listing of all check functions under the
settings / check functions page.