The heading type controls the prominence of the heading and will affect how it appears on the site.

there are 6 settings for heading type from h1 through h6 - in order of decreasing prominence. The style of each has been pre-configured for this web site.

Search engines typically look at h1, h2, and h3 types when spidering a web site, so it is important the think about what key words and phrases the site is targeting when creating headings.