How can what a person post on social media define them as a person?

if they post good things like no swearing and no bad stuff then they are a good person but if the post bad stuff then that sets a reputation as what they are

Answer: It can define their personality if they are a good person ect.

Explanation: For example based on the color of their clothes u can tell if their type of personality like if they were rainbows then they are very energetic ect.