Bletting - Google SEO ranking factors checklist | On Page SEO ranking factors
Google SEO ranking factors checklist | On Page SEO ranking factors
The H1 header tag is a strong and quite significant signal. In some cases, Google will take the keywords in the H1 tag, and present them at the title, in the search results (if the algorithm "thinks" that it is more relevant than the keywords in the title tag). You can say that the H1 tag is a kind of second title. It is important to use only one H1 tag (not critical and probably will not hurt your website if you will use it more than once).