"The pie chart shown above gives you all the different types of clicks there are to Adsense Advertisements, be it on the Search or Content Networks. We cannot disclose our methods of collection of such data, as it is our proprietary technology, and we might plan to do something about it some day. There are several categories of clicks.
We have the Fact-Finding Clicks (FFC). These clicks are just for visitors to find out more about a particular offer or just receive information, perhaps comparing offers from one advertiser to another. It is not surprising that it makes up over 60% of all clicks in our research.
What is shocking most is that out of 4 clicks, at least one of them is what we term the Curious Click (CUC). Over 25% of all clicks are as a result of curiosity. People are clicking just to find out “what’s going on”, without the intention to buy anything. That has serious implication to pay per click advertisers, but that is beyond the scope of this book.
There are also the Competitive Clicks (COC). Luckily, it is only 1% of total clicks. These are ads which are clicked by competitors of the advertisers. These competitors have no intention whatsoever to do business with the advertisers, other than to inflate the advertising costs of their competitors. Sad, but true about the existence of such clicks!
The 3% Converted Clicks (CNC) are in line with data collected by major advertising firms. These conversions only include direct sales (and exclude leads such as subscription to a mailing list, request for information, etc). What this means is that 3 out of 100 people actually buy something the first time they click on an ad. Remember we talked about Click Flipping in Chapter 4? Can you imagine making money from referral commissions from just 3% of your ad clicks (not to mention an even infinitesimal portion of your total web visitors)?"
For more see here.