Super handy! from lifehacker.
You have software to block ads on your computer, but if you want to block ads on all your devices-from your smartphone to your tablets-you’ll need something a little stronger. Enter the Pi-Hole, a Raspberry Pi image that blocks ads of all sorts at the router level.
Some ads are obnoxious, but remember: ads are how sites like us make enough money to run, so unless you want to see all your favorite sites go out of business, we humbly remind you to whitelist the sites you love.
Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!