UK as a preferred destination, and Romania as a country of the previous destination for female and male Facebook Monthly Active Users (MAU), between January and November of 2021. The 3D STC (right) and 2D map (left) display origin-destination flows where thicker and light-orange-coloured trajectories indicate connections with the most communication patterns. In comparison, smaller and darker-orange-coloured trajectories suggest a small number of connections. The proportional symbols displayed on the 2D map and base map of the STC show the same information as the trajectories of flows within individual countries.