Why All the Confusion Over Birchas Hagomel?

Source sheet (rebrand.ly/Hagomel)

• Where does the Brocho of Hagomel come from?

• Who's required to bless?

• Do you need a Minyan / Torah?

• How long do you have to say it?

• How do we calculate the requirement?

• Are the 4 exclusive or just examples?

• Can you make a Brocho for someone else?

• What's the nature of the Brocho, reciprocation or appreciation?