Age verification, or age gate, is the use of any technical system that externally verifies a person's age. These systems are used primarily to restrict access to content classified, either voluntarily or by local laws, as being inappropriate for users under a specific age, such as alcohol, tobacco, gambling, video games with objectionable content, pornography, or to remain in compliance with internet privacy laws that regulate the collection of personal information from minors, such as COPPA in the United States.