[PoignardAzur]

I don't know what various countries' norms are, but if people aren't used to political ads and are generally suspicious of the concept, an ad may have negative utility.

I know if I saw a paid ad for a candidate that would make me want to vote against them.

[Aardwolf]

Paper flyers in your mailbox, and billboards in people's gardens, are some age-old and very common forms of advertisement during elections I've seen in multiple countries in Europe

[gorbypark]

In Spain we get nicely labeled "Political Propaganda" in the mail around election time. I think by law each party can send you one letter, and it has to have the "Political Propaganda" text on the outside.

It's pretty nice in that I can throw it all straight into the recycling bin!

[baud147258]

At least in France I don't think I've seen either of those. More common are poster stuck on public infrastructure

[PoignardAzur]

There's a bunch of strictly regulated ad formats. Each party gets one "metal billboard" poster and I think one TV spot and that's it.

The most common form of political advertising by volume is probably unauthorized propaganda posters on public infrastructure, yeah. Those are annoying. Also stickers on traffic light poles and similar places.

[Mashimo]

Interesting. Where are billboards on private property common?

I mostly see them on tv, public billboards and light poles.

[Aardwolf]

Here's an example: https://img.nieuwsblad.be/vXdqo10D824EJ6p5Ab4IBfARaZs=/960x6...

[hsbauauvhabzb]

Australia small signs (100cmx50cm size) are common. Billboards you’d see down a commercial street are probably private property and often are political also.