What is Wil Reynrolds saying at 47:42 at Mozcon? Video Bundle

[Sika22]

I was watching his session and it sounds like he is saying tag crab or tag cloud?  As someone who has never heard of either or anything close I would really like to know what he is talking about. Appreciate any help!

[wilreynolds]

Tag Crowd, sorry about the mumbling

[Sika22]

Thank you!!!  I really enjoyed your session.  Opened up a whole new way of thinking for me!  Can't wait to dig into the SEER blog.