used "señorita" when the girl is single,,,as is used when the woman is young and has good manners

Señorita and señora is not the same... Señorita would be translated as "miss" Señora as Mrs. ... However, it's seen as polite and educated to address someone as "señorita" when you don't know her regardless of her look and age with a little bit of common sense as well.

Single lady, miss = Señorita Woman married, old woman = Señora

if she is married call señora if the lady is single call señorita iam sorry for my english is very bad i hope you understand me

señorita is usually used for single and or teen girls in Mexico. You could also use señorita referring to a little girl like: "esta señorita" or "mira que señorita" when a little girl dresses like a lady all fancy and stuff, or just to boost her confidence it could also mean pretty depending on your tone of voice and how you use it. like if your at a club and you say "Hola señorita" to a stranger it makes a girl feel young and pretty