Generally used in printing or web design to describe a centered block of text that groups words together that are easy to read.
<center>It is a good idea to
set-up your flyer
using a "phrase tower"
That makes it much easier
for the reader to
comprehend your message</center>
<center>You are Invited
Taylor's 15th Birthday Pizza Party
Saturday November 3
2-6 p.m.
Hamden Brunswick Bowling Lanes
4356 Columbus Avenue</center>