If you have a link, it's probably to the tag. You can go to that URL, or you can go through "Find checker", then click "Use checker" on the appropriate tag, or go through "Find script". Any of these options will give you a box with the tag's information and some buttons to the right - one of those buttons will be "Link".
Once you click "Link", you will be presented with three options. The first one will be a text link (probably what's there already). The second is a static image. The third is the one mentioned in the newsletter, which has an image that is automatically updated with numbers of successful/unsuccessful checks.
