How can I prevent the type of ad that is an file on the screen and not a pop-up?

FWIW I use Safari on a Mac.

Ex: WeatherUnderground. They always have an ad at the top of the screen that is delayed a few seconds before it appears. Inevitably it appears right as I'm about to click a button to view the hourly weather. I realize a second later I'm stairing at some random company website.

PiHole on your home network can help block a lot of junk like that.

Outside on mobile networks and other wofi? Not much unless you want to set up a vpn tunnel to your home network so that even your traffic away from home would flow through PiHole.

In reply to FatZilla Thank you sir. I've seen pihole referenced several times in the nerdery. i'll look into that setup.

I run chrome on a PC, and I use uBlock Origin. I never see ads on sites or YouTube.