Visa-free entry for a layman means to enter the country without a visa for a specified period of time. The two countries allowing this Visa-free entry have a settlement and it lies in the mutual interest in order to promote business and tourism. So, in this case, you are not required to pay anything and you can directly proceed to the immigration at the airport. You can enter the country from any legal border and by any means. In the case of the UAE, citizens of GCC nations ( Bahrain Kuwait, Oman, and Saudi Arabia) do not require a visa to enter.