One of the main reasons people moved west was for the land. There was lots of land, good soil for farming, and it could be bought at a cheap price. In addition, it was very crowded living on the East Coast. The population of the United States was growing at a very fast rate.
Pioneer settlers were sometimes pulled west because they wanted to make a better living. Others received letters from friends or family members who had moved west. These letters often told about a good life on the frontier. The biggest factor that pulled pioneers west was the opportunity to buy land.