Why designers use lorem ipsum
Placeholder text lets you evaluate a layout's typography, spacing, and hierarchy without the distraction of readable content. Because lorem ipsum is scrambled Latin, reviewers focus on the design instead of proofreading the copy.
Where it comes from
The passage is a scrambled excerpt from Cicero's De Finibus Bonorum et Malorum, written in 45 BC, and has been the printing industry's standard dummy text since the 1500s.