Readability
The term readability refers to the extent to which a reader is able to read a text and understand its context. It is worth remembering here that readability is a broad term. A text that is easy to read for one person may not be understandable for another.
A readable text meets set criteria regarding word choice, sentence length, use of punctuation, and focus on the topic. The term readability is frequently used in relation to search engine optimization.
A search engine like Google imposes many requirements on this in various updates. Especially the Google Hummingbird update has a lot to do with the readability of texts. In the past, the frequent use of keywords was one of the most important criteria for a Web page to earn a good spot in search results.
Nowadays, this form of keyword stuffing is considered black hat SEO. A good readability of a text combined with the added value that this content offers to the target audience can nowadays be seen as important prerequisites to be displayed in an attractive place in search results.
In addition, this also makes the text the best to read for "real people" and these are still the decision makers who have to make any conversion. Obviously, this objective should not be overlooked