It can be divided into those case that have a positive effect and negative effect. What has a positive effect is that you can get information easily about something and look back on history. For example, if there is a program that informs you of information on television, you can get information from program and know what you didn't know if you made a movie with a historical event. Furthermore, we can discuss the historical event with many people. However, the negative effect is that you can truly believe what is not true and that you can easily criticize people. For example, when someone is accused of being a stolen person even though did not steal something by misunderstanding, or the fake news that someone has died.