Survey Alias, as the name suggests lets a community manager rename a survey before it is sent out in the community.Keeping an internal name for the survey might hint the member of the nature of the research being conducted and hence members might potentially give biased responses.Allowing alias for a survey, helps getting unbiased responses from the members. .
Administrator will be able to create an alias for an existing survey, while sending the survey out in the community.
The members will not see the original survey name, instead they will see the alias set by the administrator.