What does "coupon must be claimed within X days" mean and how to set it up.

The coupon must be claimed within X days is a feature that the business can set up to limit the time a customer has to use a basic offer

This feature is only available for basic offers.
Here is how the business can set it ups

• Go to the business portal.
• Click on the "Offers" section.
• Click on "Create an offer".
• Select any type of offer "Basic Offers".
• Fill out the short form to create the business offer.
• Select the publish date and expiry date (date the business is creating the offer).
• Fill the custom field "Coupon must be claimed within". 
  
  e.i: If the offer is received on a customer's birthday, they have X days to use it from the moment they receive the offer.
• Click on "Save"