For today’s consumer, mobile is by far the reigning queen of screens. Your customers take their mobile devices everywhere, and use them to buy everything from sunglasses to software. Cross-device retargeting lets advertisers re-engage desktop visitors as they move to mobile devices, or retarget mobile site visitors when they turn to desktop computers to research larger purchases. Given the amount of time consumers spend these days on mobile devices, it’s a must-have channel for any advertiser looking to get out in front of audiences. Make sure you have a mobile-optimized site before launching your mobile ad campaigns, to create a flawless experience for customers and make it easy for them to complete a desired action.