Tabber is a great way to show some information in a small space. You can also use it for showing some categories or featured articles.
You can use the tabber with the following code:
<tabber> Title1=text1 |-|Title2=text2 |-|Title3=text3 |-|Title4=text4 </tabber>
Remove Title1, Title2 etc. for the titles of the tabber and text1, text2. etc. for the text in the tabber. If the tabber has less space than on a normal page it'll change the size automatically.
Example of a tabber (this tabber is customized):
The featured article of the month is...
Categories in this list.
Some information of the wiki here.
If you want to customize the style of the tabber you can find some codes on this page: Tabber/Customize