It’s important that you follow the rules of grammar and spelling when creating apps and websites, because it builds trust with your user. If a user spots a word that’s spelled incorrectly, they might start to wonder what else is wrong with your product, and that could impact really important moments in the experience, like a purchase decision.
Title Casing
All major words are capitalized and minor words, like conjunctions and prepositions, are lowercase.
“Copy”
In UX Design, the word “copy” most commonly refers to words, titles, labels, and text used in an app or a website.