Screen time % shows how much of a screen's rotation your campaign holds. What the number means, how it is calculated, and how it relates to plays and impressions.
A JOLT screen runs a rotating loop of eight 8-second spots, so it plays 450 spots an hour. Your share of time is the share of those plays your campaign holds, averaged across the screens and hours in your plan. The wizard shows it as Screen time % in the advanced metrics panel.
Share of time = plays your budget buys ÷ the screens' total play capacity over your flight.
Capacity is the number of screens × hours in your daypart × 450 plays an hour × days in the flight. Your plays come from your budget and CPM through the impressions forecast. See How impressions are forecast.
Share of time is the best single read on frequency. A person waiting at a charger or walking past a screen sees a loop or two; at 15% share of time they have a good chance of seeing you once, at 50% they will see you several times.
It also tells you whether a budget is realistic for a screen set. If your plan shows 2% screen time, the same money on fewer screens would give you far more presence per screen.
Share of time rises when you:
It falls when you do the opposite. Because CPM is fixed per plan, under a binding budget the impressions you receive do not change when share of time changes — only how concentrated they are.