Coverage is like time you spend on the floor and non coverage is time you spend doing work like restocking or putting away items after a delivery. Starbucks requires that your manager record this stuff so they know how many partners they need on the floor during peak days and how many to accommodate putting away orders and other things (not CS tho). You could have like 4 hours of coverage then like 1 hour of non coverage but still have a punched 5 hours on the app.