noun
distribution of flyers; leafleting
Refers to the act of handing out or scattering flyers, often in public places or as a form of advertising or activism.
駅前でビラ撒きをしている人を見かけた。
I saw someone distributing flyers in front of the station.
Compound of ビラ (flyer, from English 'bill') and 撒き (noun form of 撒く, 'to scatter').