A shot list is only useful on the day if it's fast to work from mid-shoot. Once a wedding has one, the day-of view on your phone is built for exactly that: tap a grouping as you capture it and move on, without opening the full editor or hunting for where you left off.
Checking off shots as you go
Open the wedding on your phone during the day and its shot list shows as a stack of groupings, each one a single tap to mark captured. A running count sits at the top ("X of Y groupings captured") so you can see at a glance how far through the list you are without scrolling it end to end. If the list was generated in Separate formals mode, the groupings are split into Before the Ceremony and After the Ceremony bands, matching how you'd actually be working through them.
Tapping a grouping is optimistic: it marks captured on your screen immediately rather than waiting on a round trip, so the list stays responsive even mid-shoot. If your connection drops for a moment, taps are held and sent once you're back online rather than lost; you don't need to notice or do anything differently. Tap a captured grouping again to undo it if you tapped the wrong one.
There's nothing to set up for this view beyond having a shot list on the wedding in the first place. If one hasn't been generated yet, the day-of view says so and points you back to the desktop Shot List tab to generate it.
What clients see
The couple (or anyone else you've shared the shot list with) sees a read-only version of the same list: no check marks, no tap-to-capture, only the formal photo list itself. It's a numbered document grouped into Wedding Party, each side's family, and anything else, with pills at the top to filter down to one section at a time. It's the same list you're working from, presented for reference rather than for anyone else to mark up.
Clients with an account see it as a tab alongside their timeline. To hand the shot list to someone without giving them full access to the wedding (a day-of coordinator, or a parent helping wrangle family for photos), use its own shareable link, separate from the couple's timeline link, which shows the same read-only list.