Readability analyzers typically scan your text for various factors such as sentence length, word complexity, and syllable count. They use these metrics to calculate a readability score that indicates the estimated education level needed to understand the text. For example, a score of 8 on the Flesch-Kincaid scale means that an eighth grader should be able to understand the email. Many tools also provide suggestions for improving readability, such as shortening sentences or using simpler words.