Web, domains and email
H1
Abbreviation for first-level heading
In short and in plain language
H1 is the main heading of a web page.
In the code, it is marked as the top level of headings. It tells visitors, screen readers and search engines what the page is about.
Below it, more headings split the content into parts.
Definition
H1 refers to the main heading of a web page, marked up in the HTML code as the top heading level. It tells visitors, screen readers and search engines what the page is about. Further levels below it divide the content into sections.