what is the snowflake looking button next to my shifter?

thanks

The Owner Manual reveals all.

Winter Driving Mode Button (Automatic Transmission)
This feature provides more traction during slippery conditions by using THIRD (3) gear when you begin to accelerate from a stopped position.
The winter driving mode button is located on the center console near the transmission shift lever.
Press this button once to turn on the winter driving mode feature. Press it again to turn the feature off. The winter driving mode feature works when the vehicle
is in any gear except SECOND (2).

This light on the instrument panel cluster will come on when the winter driving mode is active.
When you turn off the ignition while using this feature, winter mode is automatically turned off. The vehicle will return to normal driving mode. You must select the
winter driving mode feature each time you restart the vehicle if you wish to use the feature.
The transmission will be in THIRD (3) gear when the vehicle begins to move. Once the vehicle is moving, the vehicle will upshift normally.
The transmission will downshift when the accelerator pedal is pressed and held for more than two seconds, and the vehicle will accelerate more slowly than
normal while using the winter driving mode.
This feature is not intended for continuous use or for use when the vehicle is stuck in sand, mud, ice, snow or gravel. If your vehicle becomes stuck, see Rocking
Your Vehicle to Get It Out on page 4-33 for moreinformation on how to free it.

And in case you're also wondering about the "S" button:

Sport Mode Button (Automatic Transmission)
This button allows you to change the driving mode of the vehicle from the normal driving mode to a sportier driving mode. In sport mode the vehicle will have firmer shifting and increased performance.
The sport mode button is located on the center console near the transmission shift lever.
Press the button once to turn on the sport mode. Press the button again to return to normal driving mode.

This light located on the instrument panel cluster will come on while the sport mode is active.
When driving in sport mode, the transmission may remain in a gear longer than it would in normal driving mode. Also, if the transmission is in AUTOMATIC OVERDRIVE (D) when the sport mode button is pressed, the transmission will immediately downshift into FOURTH (4) gear to provide more power. Both of
these situations are normal and do not indicate a transmission problem.
When you turn off the ignition while driving in sport mode, the vehicle will remain in sport mode. If your vehicle is equipped with the memory feature, the transmission mode (sport or normal) will be saved with the memory seat position. Press the sport mode button again to turn off the feature and return to normal driving mode.