WordPress Heading Styles
Heading styles not only give your viewers a better visual representation of what the important points of your posts or pages really are, they also help search engines determine the important content on your site, helping improve your visibility.
To create headings use the styling options dropdown menu in the first row of the toolbar. The default styling is paragraph, highlight the text you would like to modify and use the dropdown menu to select a different style. By default, Wordpress offers 6 different heading styles for highlighting points on your content or for separating topics on the same page. Heading one is usually the largest and most important. Incrementally scaling down for each of the headings.
When your content is formatted as you would like it to appear on your site, remember to save or publish your content.