question about <xsl:apply-templates/>

[admin]

in this example L : <!-- m --><a class="postlink" href="http://www.w3schools.com/xsl/xsl_apply_templates.asp">http://www.w3schools.com/xsl/xsl_apply_templates.asp</a><!-- m -->
whay <xsl:apply-templates/> was inserrted? does it effect something there?
thnaks in advance
peleg