"You know" is a common phrase used in conversation to engage the listener or to imply shared understanding. It often serves as a way to connect with others by suggesting that the speaker and listener have similar experiences or knowledge about a topic. This phrase can also indicate that the speaker expects the listener to be familiar with what is being discussed. In communication, using "you know" can help to create a more informal and friendly atmosphere. However, overusing it may lead to confusion or annoyance, as it can make the speaker seem uncertain or repetitive. It's important to balance its use to maintain clarity in discussions about various subjects, such as relationships, current events, or hobbies.