FOMO stands for "fear of missing out". It is the feeling of apprehension that one is either not in the know about or missing out on information, events, experiences, or life decisions that could make ones life better. FOMO is also associated with a fear of regret, which may lead to concerns that one might miss an opportunity for social interaction, a novel experience, a memorable event, or a profitable investment. It is characterized by a desire to stay continually connected with what others are doing, and can be described as the fear that deciding not to participate is the wrong choice. FOMO is associated with worsening depression and anxiety, and a lowered quality of life. Within video games, FOMO is also used to describe the similar anxiety around missing the ability to obtain in-game items or complete activities that are only available for a limited time. FOMO is caused by feelings of anxiety around the idea that an exciting experience or important opportunity is being missed or taken away. It is generated by the amygdala, the part of the brain that detects whether or not something is a threat to survival. This part of the brain perceives the impression of being left out as a threat, creating stress and anxiety. Smartphones and social media have escalated the occurrence of FOMO by creating situations in which users are constantly comparing their lives to the idealized experiences they see posted online.