This setting is important in terms of controlling who can register on your board. Along with the Captcha, this is a good way of reducing the amount of spam your board receives.<br /<br />
Most of the time admins will want their users to validate their <b>email</b> addresses. This can help avoid false registrations and incorrect emails.<br /><br />
For tighter security, you can also enable <b>admin</b> validation. With this enabled, you will have to manually validate all accounts on your board.<br /><br />
To manage your validating accounts, you can view the <a href="#" onclick='opener.ipsclass.location_jump("{base_url}&section=content&act=mtools&code=mod", 1); return false;'>Manage Validating</a> section.