In the Paleolithic age , we didn't have a stable food supply, people were always on the move looking for food, we couldn't get our wants, it was hard enough to meet our needs. Therefore we had to make a stable food supply. We could never stay in one spot to call home because our food supply would always beccome scarce, we collected plants and hunted animals. Sheep and goats were raised for the meat and goats for the milk.
Our first important change was that we domesticated animals, meaning we would raise and tame animals and use them for their produce like milk and for their meat.
Our second important change is that we now farm so we didn't have to go far to get our food, such as animal's meat. We needed to satisfy our hunger. We could plant seeds and wait for them to grow instead of going far away. This eliminates potential danger that we could run into while traveling all the time for food.
The invention of agriculture was very important for us. It meant that we could use the soil around our homes for planting our crops and stay there forever. Also, we could raise our farm animals for food and wool for clothes. Our animals would stay on our farm with us.