The ULTIMATE way to spread your advertisement

If you're advertising something, the ULTIMATE way to spread your advertisement is by making it so valuable people want to save it, maybe even share it. For example I saved this stain chart because I had a stain I couldn’t get out, and instantly referred to this chart to see how to remove it. David Ogilvy made a "stain chart" decades ago, and it was one of the most popular detergent ads ever because so many people saved it, even posted it up! Or look at this classic Guinness Oyster Pairing ad....it was so helpful that bars would frame it and post it up for allll their patrons to see!