The This user is... template allows you to customize your user pages by adding up to 100 userboxes that will give fellow users who drop by, at a quick glance, an idea of your interests and abilities. Those boxes are not a mandatory addition to user pages at all, but an idea for those interested in it. It is similar to what exists on Wikipedia. For more on the do and don't of userboxes, please see Ice Hockey Wiki:Userbox.