Nextdoor is a private social network designed for a user's own neighbourhood. People use the app to share local events, sell items, find recommendations and alert people of important notices.
Why is it a risk?
Nextdoor is a low-risk app that stays private between you and your neighbourhood. It is a similar construct to Facebook, whereby users can post images and statuses, except the purpose is to keep up to date with what is happening in your local community.