For a coupon to work, it needs to be placed as a custom script on a landing page. Request tech team member to add this script to the page.
How coupons work for recipients:
campaign doesn't do anything (meaning does not refresh a coupon), it just creates a link that allows the user to activate the coupon. if the coupon is activated, a new link doesn't help
if coupon is the same, it doesn't matter on which page it exists, you can have 1 coupon on 2 pages, and if you activate it on 1 page it won't activate again on 2nd page
so if you want to do a job, that sends the same coupon say in 3 months, and allows to activate it multiple time, just after the period, we don't have that but can implement. You can set a minimum period after which the coupon can be activated, in this case, you can use the same coupon in the job
or you can set multiple jobs with different coupons, say 1st job sends a coupon in a month after registration, 2nd job sends coupon in a year after registration. user can only activate each coupon once, a coupon requires a page, but 1 coupon can be on multiple pages e.g. you set up a job, that sends coupon after registration, then set up job that sends the same coupon after a month if a user didn't activate the coupon (you adjust it in query builder, filter by number of coupons). this can be 1 landing page or 2, doesn't matter