On achieving the Campaign goal, you can unpublish it. Once the campaign unpublished then it will not be visible to public .

Volunteer Campaigns:

1. Go to Volunteer Campaigns.

2. Click on the Campaign to be unpublished.

3. Click on the Unpublish button at the top right hand corner.

However the operation is reversible. The unpublished campaign can be published back by clicking on Publish button

Same steps can be followed for other campaign types too.