The short answer:

 

The customer enters the associated code into the voucher field at your online checkout. You can see an example here.

 

The longer answer:

 

In order to create a campaign, you will have had to connect your website to Steppr (a quick and easy, one-off task that we simply explain). This allows us to do all the heavy-lifting in our back-end, without you needing to do anything else. This means that when customers buy vouchers on our app, the required systems then talk to each other and the customer can immediately use the voucher at your website checkout. It’s as simple as that.


Further information about this is available in the Resource Centre of your Partner Account.