From the public's point of view, informing them of solutions they may not have been aware of.

From the advertiser's point of view, finding the people who have the problem their product or service addresses.

Both of those are things that are valuable and not harmful. In practice, advertising rarely does the first. Instead, it acts as a kind of psyop. Also, most advertising engages in numerous abusive acts which make any possible benefits moot.

Rather than wholesale banning of advertisements I would like to see existing laws actually enforced and judges using existing wiggle-room to make examples of businesses that use deceptive advertising, false advertising, multiple shell companies to hide bad reputation highly prevalent on Amazon for Chinese resellers, knowingly selling defective products or used refurb products as new, making it highly difficult or near impossible to return items or contact a real person at the company and so on. Those shady companies should feel enough pain they just leave the scene all together. The same goes for countries that harbor shady businesses. After enough complaints are confirmed they must be isolated entirely from global trade long enough to make them feel real pain.