Kim Kempke, like 10 million US homeowners, loves using NextDoor, the 6-year-old neighborhood social network.
NextDoor lets her connect with people on her street, and feel safer in her Anderson Township, Ohio home.
"You know what's going on, you can talk to each other," she said. "You're not outside a lot standing at the fence anymore. But on NextDoor you can say 'hey did you notice that guy walking in the street looking at the cars?'"
NextDoor started as a way for neighbors to connect, report suspicious activity, plan a yard sale or swap an old couch or children's clothing.
But now it's expanding to let people rank local businesses near them that they feel would be a real asset to the community.