This refers to the length of time your campaign(s) will be visible to influencers in the public marketplace.
The length of your marketplace visibility for each campaign is determined by your plan tier. You can upgrade your plan at any time by clicking Change Plan under the Plan Information section within your brand account.
To run a public campaign:
Select Display in internal marketplace & syndicate to public partners or Display in internal marketplace and select a visibility date range (you can edit this at any time) to make your campaign open to all qualifying influencers. These visibility options are available in all plans.