Sometimes you want to be able to share draft projects before publishing them, so that other people can give you feedback. Doing so is easy:
On your project page, in the "Project admin" section at the top, click the "More" icon (the three little dots) next to the "Edit" button.
In the dropdown menu, click "Private sharing link"
Copy the link in the popup and share it with anyone you like!
People with the link will be able to view the project, but will not be able to edit it. No Hackster account is necessary to view the project.
Make sure to keep this link private as it cannot be invalidated!