The Standard Placeholder Text
Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularized in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software.
Why not just use "Text here"?
If you use repeating "Text here, text here...", the visual distribution of letters is unnatural. Lorem Ipsum has a more-or-less normal distribution of letters, making it look like readable English. This allows the viewer to focus on graphical elements such as font choice, layout, and color.