It's perhaps no surprise that the average online attention span is now shorter than ever. Shoppers want instant gratification, and when they can't configure or customize products exactly to their liking, there are a million other distractions to take them to another e-commerce business.   If you're thinking about product configuration and your marketing technology and e-commerce roadmap, here are four reasons why customization and 3D visualization should be high on your priority list.    Threekit 3D Configuration