ETIAS is an online system to provide pre-examine visa-exempt travelers in third countries planned to travel to the Schengen visa area. Travelers, who planning to visit EU countries covered in Schengen area, have to apply ETIAS before going to travel. The collected data base of ETIAS thoroughly protected and it will be checked against multinational databases such as ICPO. Also, it is utilized as potential security risk prediction.
ETIAS is different from normal visa.Although toravelers from visa-free countries can continue traveling with visa exemption , they MUST apply and get permission though ETIAS before going to travel.