It’s for some days that happens. I’ve noticed about those new advertising method. They appear as small box on top or bottom on this forum page. I do not have problems with. But a thing that is annoying is random popup advertising. They appear like this:
Google AdSense is now forcibly enabling their “Auto Ads” for all sites. This means that Google will automatically place advertisements where their system thinks is makes sense, regardless of the ad blocks on the site. This is likely where these popup ads come from.
As far as I can tell, there is no way to disable these ads, without disabling auto ads on the entire domain.