Hexagons are quite popular in boardgames, given the high number of neighbours, which increases the number of possible actions by players.
Only triangles, squares, and hexagons can tile a plane without gaps, and of those three shapes hexagons offer the best ratio of perimeter to area.
Which makes hexagon the shape used in Uber’s H3 geographical indexing mechanism, which can be visualized at https://wolf-h3-viewer.glitch.me/
