What is this about?

Get notified on Steam everytime there is a competitive Dota 2 match going on.

Specific team matches:

Na'Vi: http://psteamcommunity.yuanyoumao.com/groups/NaViMatches
Alliance: http://psteamcommunity.yuanyoumao.com/groups/AllianceMatches
DK: http://psteamcommunity.yuanyoumao.com/groups/DKMatches
iG: http://psteamcommunity.yuanyoumao.com/groups/InvictusMatches
Empire: http://psteamcommunity.yuanyoumao.com/groups/EmpireMatches
Cloud 9: http://psteamcommunity.yuanyoumao.com/groups/Cloud9Matches
Vici Gaming: http://psteamcommunity.yuanyoumao.com/groups/ViciGamingMatches
LGD: http://psteamcommunity.yuanyoumao.com/groups/LGDMatches
Fnatic: http://psteamcommunity.yuanyoumao.com/groups/FnaticMatches