A Smart Link/ Deeplink/ Product Link are terms referred to a link that points directly to a specific page on the merchant’s site.
If you are running a Coupon Attribution campaign, you don't need to create a deeplink, you can simply use any product link of brand's website to direct the users, this is because the conversion attribution is solely dependent upon the coupon usage.
If you are running a Link Attribution campaign, follow the guide below to create deeplinks.
To create a deep link, click 'Add Deep Link' under the options for Customize Your Tracking Link.
Paste your URL in the Add Deep Link box.
You will notice the tracking link in the grey box (Your Tracking Link) will update your tracking link.
If deep linking is disabled for an offer the merchant wants you to only use the links they provided within this specific campaign.