Flying flags are more often than not used in political rallies to show off support for candidates or motives

https://wiki-book.win/index.php/From_Veterans_to_1st_Responders:_Celebrating_Bravery_Through_Flags

Flying flags are characteristically used in political rallies to showcase beef up for candidates or factors. They create a visually impressive illustration of collective resolution as supporters come in combination to advise for swap or reaffirm ideals.