What is H1 Header Tag?

The H1 Header tag is nothing but the title of an article or a blog post. A block of text is wrapped inside the <h1></h1> tag to implement it on a page. As the best practice, H1 tag is used once in an article. Apart from H1, there are other headers tags like h2, h3, h4, etc can be used. H1 is considered the most prominent Header.