They're a tradition that " if you write any long-form content you should use 8-12 headers for a better result" More headers, more readers will understand the topic. Headers can increase the site's useusability. But I think headers do not any kind of effect on SEO because they only topic's subheadings.
What do you think about the headers? Are they really have an impact on the site's SEO?
I think it's useful and for Google, but and for people/readers to.
After all, these are not the only text/article writing rules that apply to SEO. The title of the article/text describes the topic of the article. In order to write a quality article/text, we plan a set of thoughts: outline, content, conclusion/conclusions. Adherence to these rules allows you to plan not only the content but also the brainstorming so that we do not deviate from the topic or expand too much. Thus, the title of the article/text indicates the main topic. We then divide that topic into paragraphs. After all, each topic can be described in different aspects - there are endless variants. Thus, the title, the titles of the paragraphs, and finally the conclusion - at the end of the article/text - are a summary of the whole topic written.
If we look at the article from the SEO side, we can use the title of the article and the titles of the paragraphs to place the main thematic keyword / LSI keywords in the written text.
In short about H tags using recommendations in web structure:
1. Primary keyword in URL and H1
2. Primary keyword at the beginning of title tag
3. primary keyword in first 100 words
4. Primary and secondary keywords in H2, H3 directly and with variations
5. LSI keywords in the content
In my opinion, H tags allow you to plan content /theme development in an orderly, planned, and structured way. With the help of H tags we can emphasize the most important places / main parts not only for readers/web users but and for Google