HTML strong element

The <strong> HTML element indicates that its contents have strong importance, seriousness, or urgency. Browsers typically render the contents in bold type.

The <strong> element is for content that is of “strong importance,” including things of great seriousness or urgency (such as warnings). This could be a sentence that is of great importance to the whole page, or you could merely try to point out that some words are of greater importance compared to nearby content.

Typically this element is rendered by default using a bold font weight. However, it should not be used to apply bold styling; use the CSS font-weight property for that purpose. Use the <b> element to draw attention to certain text without indicating a higher level of importance. Use the <em> element to mark text that has stress emphasis.