In the example to the left there are three tabs with favicons and two without favicons. You can see for yourself that it is difficult to know what website is associated with the "Home Page" and "Lampwork" tabs.
If you do not have a custom favicon, click on this CONNECT link and provide your contact information to request one. This is a limited time offer through the end of February 2013.
One of my clients has provided suggestions for additional ways to use the favicon. They found it to be the perfect fit for a signature line, as a watermark on stationery and as a an identifier when posting to her blog. Each time you incorporate this image in your communications, whether online or in print, you reinforce your company's brand.