You can easily publish your campaign by heading to dashboard.betterworld.org and following these three steps:
Click into in the campaign
Click on Settings
Change the visibility from "Private" to "Public"
Note: these screenshots describe publishing an auction, but the steps are essentially the same for any campaign. (Head to "Settings", and click "Publish".) Also - don't worry - you can modify things or even un-publish at any time. If you would like to watch a video about changing your campaign from Privet to Public please click here.