This is the second in a series of tips highlighting features available in Overleaf v2. If you'd like to try v2 for yourself, the beta is now open to the public at https://v2.overleaf.com.
Link sharing is an easy way to distribute your project to collaborators. In Overleaf v1, link sharing is on by default. In v2, it's off by default, but you can easily turn it on.