Splash Blocks are rectangular plastic or concrete channels that carry rainwater from the downspout away from the foundation of your home.
Uncontrolled water flow from a downspout puts all the roof's water into one spot close to the foundation, which negates the benefits of the gutter system.
Splash Blocks are of the most common solutions to this problem. They sit at the bottom of your downspout to help move water away from your house.