The answer is Automated fingerprint. Automated Fingerprint is the process that verifies a person's identity. It is primarily used for law enforcement agencies for criminal identification initiatives. It is important because it includes identifying a person suspected of committing a crime or linking suspects to unsolved crimes.
Using social media can inform you when events are happening near by.
For example: Your favorite singer of band is going on tour and they are doing it near you, social media advertises this and you can find out in time to go.