Visa on Arrival Thailand

What is the Visa on Arrival? I get a visa on Arrival?

For Europes and American visa on the Arrival is completely irrelevant. Often we get the stamp is stamped on entry visa on our passport as Arrival called. But this is false. The entry stamp we get is for 41 countries that are in diplomatic relations with Thailand provided. These can enter without a visa. There are some countries this entry stamp but not get the visa on Arrival can apply (a visa on arrival). Which countries are can be viewed on the website of the Thai embassy.