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Html Headings
HTML headings are titles or subtitles that are displayed on a webpage.
HTML headings are <h1> to <h6> tags.
<h1>is used to define the most important heading. <h6> is used to define the least important heading.
Example
This is heading 1
This is heading 2
This is heading 3
This is heading 4
This is heading 5
This is heading 6
Output:

Headings Are Important
Headings are used by search engines to index the structure and content of web pages.
Users use headings to skim a page as they display the document structure.
<h1> headings must be used for main headings, followed by <h2> headings, then the less important <h3>.
Bigger Headings
Every HTML has a default size. By using the CSS font-size property, you can specify the size for any heading with the style attribute,
Example:
Heading 1
You can change the size of a heading with the style attribute, using the font-size property.
Output:
Heading 1
You can change the size of a heading with the style attribute, using the font-size property.