The dissertation explains the internet as an aesthetic medium, authorship in the medium and platforms’ influence on the medium’s aesthetic function. This is achieved by analysing the actual art that uses the internet as an aesthetic medium. The aesthetic function of the internet as a medium is different from its informative and communicative function. It entails manipulation of the medium defined by the permanent and instant interconnectedness of the digitalised instances or representations of people, things, artificial intelligence and information to achieve a specific aesthetic aim. Internet as a medium, similarly to comics and film, allows for different kinds of authorship. A typical example of art that uses the internet as a medium is a meme. This is because memes involve meta-level discussions and group authorship, elements that are most easily facilitated by the internet as a medium. Art that uses the internet as an aesthetic medium can be single-authored if the sole author manipulates digital interconnectedness in an aesthetically significant way. Besides this general level of how the internet is characterised as a medium, there is a practical level that includes platforms on which artwork is made. These two levels are necessarily connected. Even though platforms also manipulate digitalised interconnectedness, they do not erase the internet’s potential as an aesthetic medium because artists manipulate this already manipulated content.