The following example shows how to reference content type's Tags field using a Velocity content pull. The tags are displayed both as a string, and individually (by iterating in Velocity over the contents of the Tags field).
#foreach($con in $dotcontent.pull("+contentType:News",10,"modDate desc"))
##A tag field contains a List of Strings/Tags
<strong>Tags</strong> : $con.tags<br/>
#foreach($tag in $con.tags)
$tag #if( $foreach.hasNext ), #end
#end
#end
Note that the #if( $foreach.hasNext ), #end
code will add a comma after each tag displayed except the last one, providing a proper comma separated list.