It’s a common rule to just use one h1 tag per page.Is it a problem for Google to use multiple h2, or h3, tags on a page?
JOHN MEULLER (Webmaster Analyst from Google):
That’s perfectly fine. That’s definitely not a problem from our point of view. You could also, if you wanted to, have multiple h1 tags. And we’d probably be able to deal with that, as well. So that’s something where the headings help us to better understand the structure of the page, the context of the text, and the images on the page. So if you can structure your page in a way that we can understand that this block belongs together and this block belongs together, then that helps us. And it’s not necessarily the case that you have to limit yourself to one h1 or always have this clean structure of h1, h2, h3. Some pages just have h3 tags on there, and that helps us to understand the structure as well.