Classic license same category apps

Dear sir, 

I'm planning to buy a classic license for game/marketing consumer apps. Does this mean if I make another app in the same category for game/marketing, I should buy another classic license? What do you mean by different apps? Does it mean like different categories like (Consumer ,Shopping) or different devices like eye wear etc. Thank you.

Please help me clarify this statement below:

What if I have multiple applications?

Every app needs its own license key. The same app may be deployed with a single license key across multiple platforms (iOS, Android and UWP) and mobile devices (phones and tablets). Different apps require different license keys.