Should we move unfinished User Stories forward to the next sprint?

Unfinished User Stories should not be demonstrated during the Sprint Review. The unfinished User Stories should go back to the product backlog, be re-estimated, and considered for the next Sprint. Re-estimating the user stories ensures that the future work is true to the point estimate. The work performed during the current sprint is “lost” as far as the worked points. Following this process will avoid assuming that every Sprint will have rollover stories and that the stories will remain a priority from Sprint to Sprint.