Would you like to personalize an invitation by, for example, greeting the respondent personally at the start of the survey by saying "Welcome [[Name]]" in the question text. In this way you can also include other imported data in question and answer texts of the research.
Return personal data
After you have imported your own data, this icon will appear at the right edge of the menu: 
This contains the created variables and data enrichment.
For example, have you imported the respondent's name and email address? Then you can find the following enrichment variables:
You can enter the enrichment variables [[Name]] and [[E-mail address]] in the question and answer texts, but also in the texts of emails.