QR codes are black matrix-looking boxes scannable by Smart Phones & Tablets. The above newspaper ad has a QR code linking to http://greenhillspharmacy.com/?FCC-01.
The  additional coding — ?FCC-01 — to the web site domain  http://greenhillspharmacy.com/allows the owner to track the visitors to the site from the newspaper ad. The next months ad could use a different additional coding ?FCC-02, ?FCC-03, ?FCC-04, etc to see how effective the money is spent on these newspaper ads. This can help you decide if this newspaper is worth your time, effort, and money. A great way to get people on your website.

Other options would be to have a special mobile-optimized landing page. Contests and sweepstakes are big users of QR code scanning. Our last bunch of bananas even had a QR sticker on them that took people to a page with a YouTube video for Banana smoothies.

You can even produce some artistic QR codes.

Below is an ad for some Lucky Mini White Rocks with a QR code linked up to PayPal for payment. You can create printed flyers or online ads for your products and allow people to BUY NOW on their Smart Phones & Tablets.