Many of us think that vaccines are something you get when you're young and never again, but part of staying healthy as an adult is making sure you're up to date, or get any boosters you and your doctor decide you need. The CDC's vaccine quiz gives you a list to start with. The quiz asks about your sex, age, your exposure to certain environments (this includes travel outside the US, but you can treat it as "travel outside your home country") and some of your medical history. This helps the quiz figure out which vaccines you've likely already had and which ones you should get. Once you've filled everything out, you'll see a list of suggested vaccines.
You should use this list as a starting point and compare it against your vaccination history (you may have already gotten some of the suggested vaccines). Next, talk to your doctor about which vaccines or boosters from the list you should get, since they have a better idea of your personal medical history and your current health.