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Save and Continue option allows your respondents to save the responses to your survey in the middle of the survey and come back and continue later. This is very helpful if the survey is long and needs additional references/study. To enable Save and Continue option, Go to:
The email address from the Email Invitation options is used as the From email address for sending the email with the continuation link. For more information please see Additional References.
When respondents click on the Save and Continue button the response is saved in the database as a partial (incomplete) response. Once the respondent continue with the Survey and complete the response the same response set is updated and marked as complete. However, if respondents do not complete the Survey then the response will be saved in the database as a partial / incomplete response.