Keep it short, but contains a lot of information.

Since the advent of smartphones and the internet, most readers would expect a style of writing that conveys a complete message with just a short amount of text. So whether they're reading a news article, web page, or cover letter—most likely they'd key out once they reach the fifth line of text and still don't have a self-contained message to take from. To get over this, make each section and paragraph of your cover letter short, but substantive. And break down complex sections into smaller, bite-sized pieces that are easier to absorb.