How do you become a citizen of the united states summarize

Well you can become a U.S citizen by birth or through naturalization. Being born into the country is the easy-est way to become a citizen. But if you were not then you can qualify for naturalization if your 18+, been a resident for @ least 5 years( or 3 if your married to a u.s citizen. 

Hope this helps plz make -est!