Communication is an important topic.  One communication topic is
self-disclosure.  Self-disclosure is an important concept in psychology.  
What is self-disclosure?  Below is one definition of self-disclosure.

Self-disclosure Definition:

Self-disclosure is communicating information about oneself.

Self-disclosure Examples:

 There are a number of possible examples of self-disclosure. Below are
three examples of self-disclosure:

1.  Sandy discloses to her best friend her doubts about her ability to do well
on the economics midterm.

2.  Bill provides details about his family to a coworker.

3.  While on a date, John describes to Jill his favorite books and movies.