A good heading structure is important for any website; not only does it clearly define the page structure for search engines, but it also plays a vital role in user accessibility.
Tip
Screen readers use our page's heading tags to allow a visually impaired user quick access to certain sections of our page. See the following post about how accessibility features can benefit SEO (webaim.org): goo.gl/YaI5nl.
It is recommended to have only one instance of an <h1> tag on each page; this is to describe the overall purpose of the page. Other heading types such as <h2>, <h3>, and so on can occur multiple times on the same page as they describe the different levels or subsections within that page.
It is also a best practice to ensure <h1> tags are unique across the website as a whole. As mentioned previously, these are used to define the subject matter of the page. If multiple pages have the same <h1> tag, we are essentially telling search...