Social media can affect your reputation in a number of ways.
First, social media can give people a false sense of anonymity and lead them to say things they wouldn't normally say.
Second, Social media can make it difficult to control the narrative about you. People can post whatever they want without any fact checking and it will be seen by a large number of people.
Finally, social media can be used to spread rumors or leaked information about you that may not be true. It's important to be aware of these risks and take steps to protect your reputation online.