What Is Uppercase?
Uppercase letters are the capital letters — A, B, C — taller forms used to begin sentences and proper nouns. The name comes from the upper case (drawer) where printers stored capital type. Uppercase text commands attention but reads slowly in long passages because every letter is the same height.
All-caps text removes the ascenders and descenders that give words their recognisable shape, so readers must process it letter by letter — fine for short labels, tiring for paragraphs.
Uppercase usually benefits from added tracking, since capitals are drawn for use alongside lowercase and look cramped when set together tightly.