This is where you can view the styles created for your templates. Similar to the Your Templates page, this area shows a table of your styles with all the actions you can perform on them.
You cannot create new styles from this page, as Styles are created from the templates themselves. To create a new style there will normally be a link on a template saying "New Style" which will create a style for that template. Styles are only available on paid account, and these links will display if you are on the free account.