Headings help Google grasp the main topic of a post. If you have multiple H1 tags, Google might get confused. A proper heading structure is also very important for your readers to understand the structure of your post.
Do you want to improve your H1?
If you use H1 tags in the body of your text, we advise moving it to the top of your text. Find all H1s in your text that aren’t your main title and change them to a lower heading level. An H1 is the title of your page or blog post, and you should only use it once per article. Other headings can be used more than once, as long as they are structured hierarchically.