Is Que Tal a Greeting?

English Meaning: “How's it going?” “Va” is the verb which means “go,” and in this instance it is singular. The plural form of the phrase would be “Cómo les va?” Another form of this greeting is “¿Qué tal?”

What is que tal used for?

Tal functions as an adverb with qué in questions to ask how people or things are. Literal translations of such sentences generally aren't possible, since such questions are often casual and idiomatic, so context will determine what's meant. Hola ¿qué tal? (Hi, how are you?)

Is Que tal formal or informal?

¿Qué tal? is used in both, informal and formal situations, so you can greet an elderly person with ¿qué tal?