One huge change during Westward Expansion was transportation. Railroads were being introduced and the transport of products and people was easier and more efficient. Factories and companies were now making more money, as they had an easier way of transporting goods, which meant more jobs for the people.
There were also way more mining jobs and opportunities, as new technology was being created and introduced to easily find and mine precious metals. People would travel across the country to have jobs as miners, trying to find gold and get rich.
Land was also becoming cheaper because of the Westward Expansion. The Homestead Act made it so many adult citizens could claim land and do whatever they pleased with it. Many people built homes and some used it to cultivate crops.