Your campaign can have an end date or be permanent.
A permanent campaign allows you to receive monthly donations. On these campaigns, users will have the choice between give you a one time donation or making donations each month. Monthly donations can be turned on and off at any time during the campaign.
A punctual campaign will be more appropriate for a specific project on which you need a precise amount, a permanent campaign will be better if you are seeking funding for an organisation.
You can stop your permanent campaign at any time.