Google Adwords recently introduced Product Listing Ads, or PLAs, which
are shopping specific listings in search results.
Instead of the usual text ads, PLAs show the actual product image, along with
the price and a promotional message.
These ads are much cheaper than traditional ads, and also tend to produce
more sales, too. To set up PLAs, you will need to open a Google Merchants
account(http://www.google.com/merchants), and submit your product feed to
Google. Then head over to Adwords and set up a PLA campaign.
Quick Tip: “Visual” products tend to do very well in PLAs. I’ve seen this
with stores that I’ve worked with in the past.
Resources:
Product Listing Ads Guide For Online Marketers
A 6-part guide on everything PLAs from PPCHero