Common header tag mistakes include using multiple H1 tags on a single page, choosing headers based on appearance rather than hierarchy, skipping header levels (for example, randomly jumping from ...

In a previous article, we explored the evidence around H1 tags as a Google ranking factor. Now, let’s take a look at the rest of the heading tags — H2 to H6.

The hgroup tag was intended to be a way to group h1-h6 tags, for example a header and a subheading, but the semantics behind the tag mean that only the first header in an hgroup is visible to any ...

Thus, if the site uses invalid HTML markup (e.g. multiple H1 tags, or one and the same headings on each page), the worst what must happen is that Google will just disregard the overall structure ...