I use ad blockers and open source privacy focused software whenever I can but occasionally I have to use computers that don't belong to me or an older phone where my usual applications aren't installed and seeing all the advertisements just feels dirty and dystopian.
I think the worst ads are the text to speech ones that say "Download this app today". The unblinking energenic people saying you can make a living at home are probably a close second.
Which VPN?
I use Surfshark but I expect most of the quality ones offer something similar. Nord and Express often get mentioned as the best VPNs but Surfshark as the best cheap VPN - I’m impressed with it, would recommend. You can even use Chrome on Android and most sites seem like normal, though I’ve switched to Firefox anyway
(If you are thinking of using a VPN just don’t use a free one because they’re probably dodgy)