Modern developments in technology have changed the way we socialize, communicate and work. Globalization, Information and Communication Technologies, digital culture and the increase in the amount of technology available for online communication mean that more organizations are implementing virtual teams. The growth in the use of virtual teams in organizations has incited researchers to investigate the different aspects, factors and challenges of these teams. This article uses a systematic literature review and a bibliometric analysis of virtual teams to identify the most relevant articles on the subject. These articles are then thoroughly reviewed and finally, a summary is made of all the research published over a five-year period. The systematic review of literature proposed by Ramey and Rao [1] and enhanced by Pulsiri and Thesenvitz [2] was used to examine the Scopus and Web of Science databases to identify the theories, research problems, research methodologies and results of 2354 studies on virtual teams published between 2015 and 2019. The main topics of the existing research in the field are reviewed, and the main limitations, problems and existing gaps in research are presented.

The evolution of digital advertising, which is aimed at a mass audience, to programmatic advertising, which is aimed at individual users depending on their profile, has raised concerns about the use of personal data and invasion of user privacy on the Internet. Concerned users install ad-blockers that prevent users from seeing ads and this has resulted in many companies using anti-ad-blockers. This study investigates the sociological variables that make users feel that advertising is annoying and then decide to use ad-blockers to avoid it. Our results provide useful information for companies to appropriately segment user profiles. To do this, data collected from Internet users (n = 19,973) about what makes online advertising annoying and why they decide to use ad-blockers are analyzed. First, the existing literature on the subject was reviewed and then the relevant sociological variables that influence users’ feelings about online advertising and the use of ad-blockers were investigated. This work contributes new information to the discussion about user privacy on the Internet. Some of the key findings suggest that Internet advertising can be very intrusive for many users and that all the variables investigated, except marital status and education, influence the users’ opinions. It was also found that all the variables in this study are important when a user decides to use an ad-blocker. A clear and inverse correlation between age and opinion about advertising as annoying could be seen, along with a clear difference of opinion due to gender. The results suggest that users without children use ad-blockers the least, while retirees and housewives use them the most.