Render active an application using a key binding

[Javier Garcia]

Hi,

I know that i can associate a key binding to open an app (Mod+Enter opens
the terminal).

But, how to render active the app with a key binding?

Should I associate a key binding to the app? or should i open always the
app in a specific tag (in that way i can render active the app using
Mod+1,2,3...) ??

Javi