To append the subscriber's zip code to a link and ensure that the clicks are tracked, you should use the Lookup function to retrieve the zip code from the data extension and the RedirectTo function to create the link with tracking enabled.

Lookup: Retrieves the zip code from the data extension.

RedirectTo: Ensures that the link with the appended zip code is tracked.

Example:

ampscript

Copy code

%%[ SET @zipcode = Lookup("DataExtensionName", "zipcode", "SubscriberKey", _subscriberkey) SET @link = Concat("http://example.com?zip= ", @zipcode) ]%% Click Here

Salesforce AMPscript Lookup Function

Salesforce AMPscript RedirectTo Function