The advisory is in response to increased tensions in various locations around the world, the potential for terrorist attacks, and demonstrations or violent actions against U.S. citizens and interests.
The advisory is not asking people to cancel their planned travel, but it is asking them to be more alert and aware of their surroundings.
Travelers are encouraged to sign up for the State Department's STEP programme and to keep their friends and family informed of their travel plans.
Travelers should also avoid super crowded iconic tourist places and not have their eyes glued to their phones while traveling.
Travelers should reconsider their itineraries if they are planning to travel to Israel, Egypt, Lebanon, or Jordan.