Given that the scientific interest has shifted from the general Internet use to the use of specific Internet content, the aim of this paper is to provide a comprehensive overview of the latest knowledge of mostly foreign, but also domestic professional and scientific literature on online sexual addiction (cybersex), online gaming addiction and social networking addiction, as the most common modalities of Internet addiction. In the first part of the paper, the author looks at the Internet as part of modern media in the atmosphere of today's so-called technoculture, then explains the phenomenology of Internet addiction, followed by the elaboration of certain modalities in terms of clarifying the object of addiction, defining and conceptualizing the disorder and describing the epidemiology, etiology and existing treatments. In the last part of the paper, the author looks at the problematic and addictive smartphone use through which Internet content is available to us at any time. In conclusion, the problems elaborated in this paper undoubtedly are, and it is to be expected that in the future will be even more, problems experts such as social pedagogues deal with, so it is important to keep abreast of current knowledge in this very dynamic and complex field of Internet addictions.