It means that you agree to leave the United States, without attempting to assert any rights to stay.
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The Visa Waiver Program (VWP)
The Visa Waiver Program (VWP) allows citizens of certain countries to travel to the U.S. for up to 90 days without obtaining a visa. Not all countries participate in the VWP, […]
Visa
A stamp placed in a passport that allows their holders to enter the United States according to the conditions for that visa type. The validity period on the visa is […]