Dynamic links

For dynamic content check out this article instead.

You can add links in email messages that are unique for each contact. For example:

https://www.mysurvey.com/UNIQUEID

You need to set up the unique text as a custom field and import data into this field, then you can and add it as a merge field for your link using this format: {@my-FIELDNAME}

For example if your field is called: surveyid then the link becomes:

https://www.mysurvey.com/{@my-surveyid}