The <hgroup> tag is used to group heading with associated sub-headings. More specifically it can say that HTML5 <hgroup> element is used for grouping <h1> – <h6> tags. It works just like a container of two or more related heading elements.
The <hgroup> tag was newly introduced and also subsequently been dropped from the W3C HTML5 specification. However, it is still included in the WHATWG Living Standard specification.
Web browser support:
HTML5 <hgroup> tag is supported by latest versions of all web browsers. Internet Explorer 8 or earlier versions of Internet Explorer do not support this tag.
There is a HTML5 <hgroup> element example given below:
<article> <hgroup> <h1>Title of article goes here</h1> <h2>Sub-title of article goes here</h2> </hgroup> <p>Article content goes here...</p> </article>