Why did the US Government give land grants to railroad companies?

The U.S. government provided land grants to railroad companies to encourage the construction of railroads, which were essential for connecting distant regions and facilitating westward expansion. These grants helped stimulate economic growth, promote settlement in the West, and enhance trade by improving transportation infrastructure. By offering land, the government aimed to incentivize private investment in railroads, ultimately contributing to national development and the creation of a more integrated economy.