I have a RLine and it has working driving modes. Eco, Comfort, Sports and Individual.
Comfort is the default.
When I change to Sports it holds onto each gear longer before changing up, enabling a sportier drive - good for acceleration. It also adjusts the ride (as I have DCC suspension), the steering has far less power assistance so feels good around corners.
When I change to Eco the opposite happens to the gears - it changes up early to aid economy, the AC is also turned down so that it doesn't sap as much energy.
Individual is as it says you can set any permutation of Eco, Comfort and Sports. In individual you could have everything Comfort but with Sports steering.
One thing to look out for is that on switch off and switch on the drive always reverts to Comfort. So drive in Sports and turn off the ignition, when you next start up the dash will say you are in Sports. Most things will be - suspension, steering, ACC, but the gears will be in Comfort. A quick pull back of the gear nubbin for S will put you back fully in Sports.
Obviously to have any effect on gear change it has to be combined with an auto gear box.