MyBB Community Forums

This at the footer, makes the forum looks a bit unprofessional.

How could I make this either invisible or what would happen if I removed it?

Nothing would happen if it got removed, just the fact that users including the admins would not be able to view that section at the bottom. You can edit this in your foot template. Just delete out the stats.

that is debug information useful for the administrators and visible only to them (see this to remove it)

i would like to have one option to hide that to

ACP > Configuration > Server and Optimization Options > Advanced Stats / Debug information