ASK A QUESTION ¿Cómo 'se' llama usted? Why se??
como 'se' llama usted? this means what is your name. but why 'se' is used?Can't we use 'es' instead of 'se'? because 'es' is translated as 'is' in english then why 'se' is used?
"¿Cómo se llama?" literally translates "What do you call yourself?" You could also say "¿Cómo te llamas?" to be a little less formal.
An English speaker might also be tempted to ask "¿Cuál es su (tu) nombre?", literally translating to "What is your name?". About the only time someone is likely to use that expression is when filling out a form or something.
¿Cómo SE llama? is almost the same as ¿Cömo TE llamaS?. The first one is used with more respect, like when asking an adult you don't know, your boss, teacher, etc. To ask the question to younger people you use the second one.
Cómo se llama?"
I think this best said as "What is it called" If so it is a passive structure.
I may be wrong (Maybe I am wrong) for Heidita.
As I understand the question that was asked, it was:
"Why is 'se' used in "¿Cómo se llama?"
I put it to you that the correct grammatical answer is because the sentence "¿Cómo se llama?" involves the use of the pronominal reflexive verb "llamarse" which means, among other things"to be called, to be named, to name oneself".
As with all reflexive verbs, when the verb is conjugated, the clitic "se" at the end of the verb is transferred to a place in front of the conjugated portion of the verb.
There is more detail about reflexive verbs on our Reference Page, Here ----> Reflexive Verbs