Smooth - a word with many meanings

GMG Radio will rebrand its newly acquired Saga stations as Smooth Radio in the middle of March. Note: Saga is the UK’s best known 50-plus (some would say 70-plus) brand.

The press release says: “Significant marketing will be invested in the launch of the new brand as GMG re-positions the stations to offer greater appeal to a more mature audience”. I have not idea what that means??

When rebranding it is important to select a name with consistency of meaning. I am not sure that applies to ‘Smooth’. The dictionary definition of smooth comes up with:

level, even, not rough, flat; free from obstacles, unhindered; calm, serene, tranquil; polished, suave; free from lumps, having an even texture; mellow; glib, ingratiating

I wonder which of these words GMG Radio had in mind? Dick Stroud