Generally, bravo/a is good at something. For example, if I say I tap dance, you might ask me if I'm good with bravo. ("Sei bravo?") Or if you want to say someone is a good cook (meaning good at being a cook or at cooking), you would use bravo/a. Most other meanings of good would be buono/a.

This particular sentence is a bit of an exception. When you refer to un bravo ragazzo or una brava ragazza it means "a good boy/girl" in the "good person" sense, although I suppose you could argue that it's still in the sense of good at being a boy/girl if you think that means doing a good job at what boys/girls are supposed to do (being polite, obeying parents, doing chores without complaining, completing homework on time, etc.).

"Great" is not really a valid translation of "bravo", because it has a stronger meaning than good/ clever. "Great" is usually "grande", but I doubt that would be used in this context, since it would sound like "You are a big boy". Probably "tu sei un bravissimo ragazzo" would capture the meaning of "you are a great boy".

It is an alternative according to the dictionaries, but seems to be rarely used compared with 'coraggioso'. However, bravo is very much used for "good", "clever", "skilful", "capable", "honest", "decent", etc. so don't kid yourself that brave is the right answer here.

I also think it could be translated like that.

btw a better translation of "You are a good guy." would be "Sei un bravo tipo."

That's good too, I think! Ragazzi is often "guys".

Yes, I think that's good.

Also, a clever boy is " un ragazzo bravo"". The positon of the adjective alters its meaning.

Nice tends to be translated by "simpatico" for people - a bit different to the meaning of "bravo".

This is probably because with some words (including "bravo"), order matters: http://www.italyheritage.com/learn-italian/course/grammar/adjectives.htm

I am = io sono You are = tu sei He/she/it is = lui/lei è (there is no word for it) We are = noi siamo They are = loro sono You (multiple) are = voi siete

"Fare" is more like a "do" word. I did this, I did that. It can also, more commonly, be used for the English word for "make."

you should report the problem...

Adjectives (bravo/brava) and determiners (un/una) reflect the gender/number of the noun (ragazzo/ragazza):

• Tu sei un bravo ragazzo = You are a good boy
• Tu sei una brava ragazza = You are a good girl

Brave = corragioso. Bravo is a well-known "false friend" for English learners of Italian. It is already explained above, and Duo asks us to look before posting duplicates.

Sono un ragazzo cattivo - which indeed you are for being too lazy to use an online dictionary! :-)

You are wrong. Bravo means 'good', in these senses. 1. Able (good at, clever, skilful, capable). 2. Well-behaved (decent, honest). 3. Kind.

One sense overlaps with successful, which is 'good at'. However, successful describes achievement and is typically translated by riuscito, di successo, o arrivato, whereas bravo describes the actions that lead to achievement.

See https://www.thoughtco.com/italian-adjective-order-4098168