The shift from hunting and gathering to farming changed the life and cultures of the Native Americans greatly.
Once they started with the farming, the Native Americans started to have a settled life. That meant the building of permanent houses, and the abandoning of the constant migrations throughout the countryside.
The fact that they started to produce enough food for themselves and also have reserves, meant that they also had more time to focus on other things. They started to create pottery, to develop the art, live more peaceful lives.
That was a big step forward compared to the hunter-gatherer lifestyle and culture, which was mostly based on survival from day to day, as well as constant battles for better hunting grounds with other tribes.