It can be used in a variety of contexts, including:
* To emphasize a statement: "C'est vraiment beau." (It's really beautiful.)
* To express surprise or disbelief: "Vraiment ?!" (Really?!)
* To indicate agreement: "Oui, vraiment." (Yes, really.)
* To show sincerity: "Je suis vraiment désolé." (I'm truly sorry.)
The meaning of "vraiment" can be influenced by the tone of voice and the context of the sentence.