What does it mean to save college entrance examination volunteer information by SMS?

It means that this batch has been filled in.

You can also fill in the next batch, which means that if this batch is not accepted, you can fill in the next batch of volunteers. After each batch of volunteers is filled in and checked correctly, be sure to click the "Submit and Save Volunteers" button to save the volunteer information in the server.

Every time you log in to the system to fill in or query information, or leave the computer halfway, you must click "Exit" to exit the online volunteering system, and at the same time close the browser page for volunteering to prevent the volunteering information from being tampered with by others.