Some of the advertisers and Web analytics firms used on this site may place "tracking cookies" on your computer. We are telling you about them right upfront, and we want you to know how to get rid of these tracking cookies if you like. Read more »
The Read more link goes to a page which exactly explains what tracking cookies are
Tracking cookies are small text files that can tell such companies what you are doing online, even though they usually don't record your name or other personably identifiable information. These cookies are used by these companies to try and match ads to a user's interests. They are used all over the Web, but in most cases, their presence is only disclosed deep inside privacy policies.
Or how to delete the cookies;
You can also change the preferences or settings in your Web browser to control cookies. In some cases, you can choose to accept cookies from the primary site, but block them from third parties. In others, you can block cookies from specific advertisers, or clear out all cookies.
The page shows more ways, including software you need to install and... blah blah blah... Really more ways to delete your cookies, check out the page!
What is more interesting, is that the site is letting me know it's the first time I visit AllThingsDigital.com. Not so right! Did I delete my cookies? Not so right! Do I have software installed that does it? Not so right!
All still not really interesting. But what's more important, is that the site actually tells people to delete their cookies if they don't want to be tracked. A lot of people are going to loose money over that. Cookies are the bread & butter for the affiliate industry. People deleting their cookies, might harm a lot of affiliates with all their efforts wasted. Some cookie lifetimes are set just on 7 days, some programs still pay out within 30 days after the initial click.
Thanks All Things Digital!