✔ 最佳答案
The term refers to the English that can be understood by a majority of English speakers. This means that regional words are to be avoided, because these terms are familiar to a smaller group of individuals. For example, "soft drinks" are often commonly referred to as "pops" or "sodas" in the US. If you ask for a "pop" in an international setting, you may find that fewer people would understand what you refer to.
You can probably search in Wikipedia about the differences in American and British English.