On the Home page of your site, in the Navigation pane, click the Categories link.
On the Categories page, click the Category tile representing the category you will be viewing.
You can view the description of the category before you click it by hovering your mouse over the category before you click it.
On the Category page for your selected category, you can filter the resulting list by clicking the Recent, What’s Hot, or My Discussions links. You can find additional filters by clicking More Options ellipsis (...).