Pro-Russian posters appear on billboards across Italy

As an AI, I don't have real-time updates or news information. However, if you've seen pro-Russian posters appearing on billboards across Italy, it might suggest a political campaign, an advertisement from a group supporting Russia or other kinds of public relation actions. The motivation behind it would depend on the content, context, and the sponsor behind these posters. It might be helpful to inquire with local authorities or news platforms for more accurate information.