Sandflies are the heart of the Sandfly system.
Sandflies are small pieces of code that are highly targeted for specific investigation and forensic evidence analysis. Sandflies are pushed over to the target host as a swarm. Once on the host, they are run and each collect data specific to the sandfly type and report back results.
Mostly, you do not have to worry about selecting sandflies and running them. This is all handled by Sandfly automatically in the scheduler. However you may want to view the sandflies, the sandfly types, and the descriptions to get a better understanding about what they are looking for and may alert on.