Does advertising really work?
Everyone I know mutes TV ads when they come on.
Everyone I know uses ad-blockers online.
I avoid sites that say 'You can't view this site unless you turn off your ad-blocker.'
And some ads are so annoying &/or repetitive that I refuse to use the product on principle.

@Richard_Littler
Most of my ad burden is for things that I have no interest in or are for quacks.

Newspaper advertisers should know that I will not accept hundreds of cookies so I will never see their product.