A swarm is multiple wrapped vehicles all in one spot at the same time. All cars drive along a predetermined route for 1-2 hours. This gives you the opportunity to earn a flat rate on top of the normal earnings you make driving with the app in the campaign zone. The Swarm pay is $25-$200 per hour.

Swarms are kept track of internally. So no need for concern, your deposit will reflect the swarms that you participated in.