Now I understand; thanks a lot. As I am from Georgia, I am not eligible to apply for a Tourist Visa online, so I should do it only in the Thai Embassy, right? I can't first come to Thailand and apply for a Tourist Visa from some tourist agency?
Guys, I got that, but as I did research they are saying that if I have a single entry visa I can cross the border of Thailand and come back and I can extend my visa, same for multiple visa. That is why I did not understand the difference.