Premium is a special account subscription. When your account is Premium you can set CPC (Points Per Like/Follow/..) above everyone's content who isn't Premium. To get likes/followers/views/ect.. faster make sure your using the highest CPC. Premium account let you to set Higher CPC for all systems.
When your account is Premium, you can advertise in Banners or Text-Ads for X2 Cheaper! than standard account.
When your account is Premium, you can set Higher CPC to get Likes/Fans FASTER.
Premium Members on LikesPlanet : 600