When a client taps a button on their shortlist, you get an email with what they picked and any note they added. Turn it off under Settings, Notifications.
Every request also shows on your dashboard. Click Mark contacted once you've followed up, or Close when it's done (and Reopen if you need it back). The bell at the top shows when clients open decks, finish swiping, or send requests.
Tip: Request emails go to whoever made the deck, so each teammate hears about their own clients.