Subheads add visual interest to your articles and make them easier to read by breaking long expanses of text into manageable, bite-sized chunks. Each subhead provides readers with a convenient entry point into your article. Readers are likely to skim your subheads and begin reading when they encounter something that attracts their interest.
To succeed, subheads must contrast with the text they introduce. Often, best results by setting subheads in the same typeface used in the headlines, only smaller. Using the same typeface for headlines and subheads simplifies and unifies your document. Place more space above subheads than below them. This emphasizes the break between the previous topic and the next topic.