Modern technologies have made it easier to research and draw conclusions about the optimal length for a post, article, or book. We know what sentence length should be to make it easier for readers to stay focused longer. For example:

• The average sentence length in any scientific journal is 60 words.
• The length of the average sentence in the Harry Potter books is 12 words.

And this is for a reason. 

Are you wondering what else the research shows?

• An 8-word sentence is 100% perceived by the reader;
• A sentence with 8-14 words is 90% by the reader;
• But a sentence with 40 or more words is only 10% by the reader.

Posts that are too short or too long will have poorer results, while the content of sufficient length works better. It’s easier to create a 250-word post because it’s quick and effortless to gather material. However, that length doesn’t provide the essential information potential readers need. Also, word count is a crucial factor when working with SEO, and if you’re writing or doing translation for an online environment, that’s worth considering, too.