To collect shields in Monopoly GO!, participate in events like Peg-E and Egyptian Treasure. These events, along with tournaments, offer shields when you achieve a high ranking.
Complete quick wins tasks to earn shields easily. You can do this by landing on specific tiles, shutting down buildings, or collecting a set amount of cash.
Look for tiles with shields on the game board. These shields appear randomly and will spawn on new tiles once you collect them.
Daily check-ins and completing daily tasks are another way to earn shield skins. Make sure to log in every day and finish these tasks.
During limited-time seasonal events, you can unlock shield skins by completing challenges and hitting milestones. These skins will help protect your landmarks and improve your gameplay.