How does the Internet allow for individuals to select and promote what they consider the positive features of their identity and omit any perceived negative elements, or even construct an “imaginary persona”? What are some dangers of this feature of the Internet?

Aeronautics by Geoffrey

How does the Internet allow for individuals to select and promote what they consider the positive features of their identity and omit any perceived negative elements, or
even construct an “imaginary persona”? What are some dangers of this feature of the Internet?