The United States developed an application known as ESTA used to approve those traveling to the USA. Those traveling or transiting through the United States can apply for an electronic system for travel authorization. With an ESTA, you will not need a visa to travel or transit through the United States. However, regardless of its ease of applying, most people don’t have the right insights about the electronic system for travel authorization. To get more info, visit US visa application online. You will need a guide for the application of an electronic system of travel authorization.
The validity of an electronic system for travel authorization takes two years starting from the day it was approved. Re-applying for another ESTA is allowed after the two years of validity. To get more info, visit visa for usa. You will, however, need to re-apply for another ESTA in case your passport expires before the two years of an ESTA validity. Note that your ESTA details are tied to your passport and that is why you need to re-apply for your ESTA if you are applying for another passport. Note that you will need to re-apply for another ESTA as soon as your passport expires. You might be banned from traveling to the united states in future if you overstay the ninety days.
You will only be eligible to travel to the United States if you have an approved electronic system for a travel authorization. Learn more from https://en.wikipedia.org/wiki/Travel.