The concept of addiction, which is defined as an over-indulgence of an object or behavior, usually associated with the use of substances such as cigarettes, alcohol, and drugs. However in recent years it has been argued that some behaviors such as pathological gambling, exercising, binge eating, sleeping etc. are addictive as well. The same applies to use of technological devices and applications such as computers, the internet, online games, tablets, mobile phones etc. Excessive use of these technologies can lead to technology addiction. Computers, the internet and smartphones have become an important part of everyday life. According to the "We Are Social" 2017 and "Internet and Social Media Users Statistical Report", 50% of the world population uses Internet, 37% are active social media users and 66% are smart phone users. This situation is similar in Turkey. According to the data of Turkish Statistical Institute 2016 61% of Turkey's population uses the internet, and the leading purpose of using the internet is social media. In addition to that, there is at least one mobile phone in 96% of households in Turkey. Risk taking and excitement seeking behaviors during puberty increase the susceptibility of adolescent to addictions. The use of technologies such as the Internet and social media is more common among adolescents than adults. Adolescence is regarded as a critical period in terms of technological addictions such as internet addiction, social media addiction, digital game addiction and smart phones addiction. The prevalence of technology addiction in adolescents ranges between 4.2% to 21% in the world and 2.33% to 14% in our country. Puberty is an important period in terms of identity and personality development. The need to be a member of a group, the risk of loneliness, and the increase in depressive tendencies etc. may increase the risk for technology addiction in adolescents. Therefore, technology addiction in adolescents, historical development process, risk factors for technology addiction and its relationship with mental illnesses, recognizing technology addiction, prevention and intervention methods will be discussed in this review.