Lorem ipsum

The text is a mangled extract from Cicero. A passage of De finibus bonorum et malorum on the nature of pleasure, written in 45 BC, contains the phrase dolorem ipsum quia dolor sit amet, and some Renaissance compositor cut the opening word, scrambled the rest, and used the result as a specimen. It reached modern design through Letraset dry-transfer sheets in the 1960s and then through Aldus PageMaker, which shipped it as sample copy, which is why the same corrupted paragraph appears in software that has nothing else in common. The older word for the practice is greeking: text set as pure texture, unreadable on purpose, so the eye grades the block instead of the sentence.

That unreadability is the whole argument for it. Set a column in language the viewer can read and they will read it, and a judgement about measure, leading, and the colour of a page turns into a judgement about the words. Latin has roughly the letter frequencies and word lengths of English without meaning anything, so it gives a paragraph the right grey.

It also hides every question worth asking. Real content has lengths that placeholder text is careful never to have: a name that is one word, a title that is a German compound running to forty characters, a bio nobody filled in, a product with two reviews and another with eleven thousand. A card grid that looks composed under lorem ipsum is a card grid nobody has tested, and the failures it conceals are the ordinary ones, not the exotic ones. Designing with real content, or at least with a set of deliberately awkward real examples, is the correction, and it is cheaper before the layout is built than after.

The practical hazards are small and constant. Lorem ipsum ships: it turns up in production pages, in printed brochures, and in press releases, because nothing in a build fails when placeholder copy is still there. It also lies to assistive technology and to translation, since it is neither English nor Latin as far as a lang attribute is concerned. The joke variants (bacon, hipster, cupcake) trade the one property that made the original useful, which was being ignorable, for a paragraph that everyone stops to read. If you need filler, use the real thing, keep it out of anything anyone can publish, and treat every block of it as a question you have not answered yet.