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

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.

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