Type styles like bold or italic help add emphasis to a heading. When formatting your headings, the emphasized elements should reinforce the hierarchy.

Applying bold type style to a larger or different font helps headings stand out from the body text. Italics work well for emphasis or contrast in the body text — but in a heading, they don't work so well on their own. However, together with large font size or bold type style, they add prominence to a heading and increase scannability.^[1]