Shield blocked a site that was pretending to be a real bank or store before it could load, and it's already been handled.
What this means
Shield noticed your device trying to open a site designed to trick you into entering personal or financial information, and blocked it automatically before it could load. Nothing was shared, and no action is needed from you.
What to expect
You'll see this event in your Activity feed, sometimes grouped together if several sites were blocked around the same time. Your device stays fully protected the whole time; scam site blocking runs automatically in the background.