A person, predominantly born after 1990, who prefer media content created for a vertical display (as opposed to a horisontal one). Smart phones and social media are important elements in every vertical's life, altough mainly relying on apps with a vertical interfaces like Snapchat or Tiktok (and to a much lower degree on non-vertical or semi-vertical apps such as Facebook or Instagram).
The vertical rarely uses a TV, and does never shoot horizontal pictures.
In addition, a vertical never uses capital letters when writing.
The vertical shares many similarities to the zoomer, but is not necessarily fixed to a certain age group. Being a vertical is a behavior and not a generation.
Sarah, stop being such a vertical and take a horizontal photo already