Heading styles not only give your viewers a better visual representation of what the important points in your post 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 drop down menu in the first row of the toolbar.  The Default styling is paragraph.  Highlight the text you would like to modify, and use the drop down menu to select a different style.

By default, WordPress offers six different styles styles for highlighting points in your content or for separating topics on the same page.  Heading 1 is usually the largest and most important, incrementally scaling down for each of the following headings  When your content is formatted exactly like it to appear on your site, remember to save or publish your content.