How Do People Afford To Travel

I’m curious as to how people can afford to travel so much. I’m sure that it’s not always easy to do, but I’m wondering what strategies people use to make it possible. I’m sure that budgeting and saving are key components, but what else do people do? Do they have side hustles or other income streams? Do they use credit cards or reward programs? I’m sure there are a lot of different strategies out there, and I’m hoping to learn more about them. Any advice or insights would be greatly appreciated. Thank you!