HTML tutorial

This week I began working on learning a new function tag in HTML called the <details> tag. This tag enables you to condense and hide information and then restore it by pressing the small arrow by the tag's name. I can already see how this can be useful in making FAQ type tages and displaying all key points within view without the need to scroll.
 tutorial link: http://net.tutsplus.com/tutorials/html-css-techniques/quick-tip-the-awesome-details-element/