"Obviously" is an adverb used to indicate that something is clear or easily understood. It often suggests that the information being presented should be apparent to most people, making it a way to emphasize the obviousness of a statement or situation. In conversation, using "obviously" can sometimes imply that the speaker believes the listener should already know the information being discussed. This can create a sense of shared understanding, but it may also come across as dismissive if the listener is not familiar with the topic, such as science, history, or current events.