Just over a month ago I added GoogleCheckout as a payment processor on my site. This resulted in the much vaunted GoogleCheckout badge being displayed next to my Adwords Ads. I expected an increase in clickthough ratio (% of people who see the ad who click on it) due to greater visibility and a consequent decrease in conversion ratio (% of clickers who go on to buy) due to the greater visibility attracting more ‘tyre kickers’.
I have now looked through 2 months of data (a month before and a month after) and the exact opposite has happened. My Adwords clickthrough ratio has dropped by 10%, but the conversion ratio has increased by 20%. Perhaps the badge is actually putting off the tyre kickers by making it clear that the product isn’t free? It is hard to know how much of this is due to the badge and how much is due to other factors and I will be checking the stats again in another month. I would be interested to know whether other people have had similar results.
The moral of the story is: don’t assume, measure.