This is the 656th most frequent Russian word.
правильно
Correctly; properly; rightly.
The word "правильно" here acts as an adverb describing how the subject performed the action of answering.
Она правильно ответила на вопрос.
She answered the question correctly.
In this sentence, "правильно" is used to inquire about the listener's accuracy in understanding the speaker.
Ты правильно меня понял?
Did you understand me correctly?
Here, "правильно" modifies the verb to indicate that the decision-making process was appropriate or accurate.