moodle/lang/en/help/workshop/password.html

<p align="center"><b>Passwords</b></p>

<p>This field sets the &quot;access&quot; password for this exercise. The 
    password can be up to 10 characters long. The password can be reset at any
    time during the workshop. Whether students are asked for the password to 
    enter the workshop is determined by the &quot;Use Password&quot; option.</p>