First, H1, H2, and H3 tags are HTML headlines that create a structural hierarchy to make it easier for readers and Google to scan and understand your content. When a browser reads one of those tags, it knows how to present the headline on the page. When readers see one, they can quickly find the information they need on a webpage.
H1, vs H2? Header tags are numbered according to importance (H1-H6). Skipping from H2 to H4 because you prefer the smaller size of the header will disrupt the organizational flow of your piece. Think of these tags almost as elements of an outline: H3 tags should ideally nest under H2 tags, H4 tags should be nested under H3 tags, etc.
The differences are that browsers use default styling (eg., without any CSS, text written in h1 will look different to text inside p, the styling differs from browser to browser). To unset the default styling, a technique often referred to as CSS normalize or CSS reset is used. Furthermore, screen readers work better with semantic tags. H1 and H2 may be a little more rare in usage when compared to Q1, Q2, Q3, and Q4, but they are used sometimes regardless. In short, H1 means the first half of the year and H2 means the second half
You have H1 as the main heading and then five tags that function as SEO subheadings. That said, most pages use H1, H2, and H3 heading tags on their pages and rarely push into H4, H5, and H6. What you use depends on the structure of your page or article. For our purposes, we will focus on the three most common headings tags.
The Apple H1 and H2 chips sit at the heart of this effort, delivering faster pairing, better Bluetooth audio quality, and improved noise canceling. The H1 and H2 chips are found inside a range of l4Rdc. 465 488 227 426 169 364 372 420 380

h1 vs h2 vs h3 vs h4