XML : config.xml file of Magento extension

I got the below code in a config.xml file of a Magento extension.

  <admin>      <routers>          <brandlogo>              <use>admin</use>              <args>                  <module>Mconnect_Brandlogo</module>                  <frontName>brandlogo</frontName>              </args>          </brandlogo>      </routers>  </admin>    

I would like to know what the <frontName> tag is?