If you need to track the sources of the fillings of your respondents or you want to provide a unique identifying parameter (for example, the user's ID from your system), use the external key, parameter by adding it to the survey's link.
external_key is added as a classic GET parameter to the survey's URL.
It is any sequence of alphanumeric characters.
The presentation and analysis of the results
If the external_key parameter will be provided in the link to the survey, this information will appear in the following places:
Viewing single sheets
Raw data export to the CSV
Raw data export to the XLSX
Export to the SPSS
In the case of the raw data and SPSS file, it will be a column in Excel, respectively, or an additional change of the V in the SPSS.
What should be remembered?
It is possible to fill in the survey multiple times with this parameter.
The parameter can be used at all survey security levels