About
Readability measures how easy text is to understand by looking at words and layout. Experts like Flesch-Kincaid and Automated Readability Index help test reading level. For example, ARI uses the average number of characters per word and words per sentence to give a U.S. school grade level—e.g., 8 = eighth grade. Simple words, short sentences, clear design, and legible fonts make text easier to read. These tests help match writing to different audiences' skill levels.
Why it's important
Improves communication by helping readers quickly understand messages without confusion or frustration.