Although Driveways need very little maintenance, they do need brushing and washing to keep them looking good.
Dirt, debris, moss etc. gather over time and washing will clean it all off.
Maintenance keeps paving in prime condition: lack of maintenance allows paving to deteriorate.
Even if it's just a basic wash-down with soapy water, all types and forms of paving will look so much better for it, while certain types of paving tend to need a bit more care and attention to ensure they always look as smart as possible.