Final answer:
The
tag is commonly used to create custom block-level tags in HTML.
Step-by-step explanation:
The <div> tag is commonly used to create custom block-level tags in HTML. To create a custom block-level tag, you can assign a class or id to the <div> element and then define its style properties in a separate CSS file or using the <style> tag within the HTML document.
For example, let's say you want to create a custom block-level tag called <highlight>. You can use the following HTML code:
<div>This is a custom block-level tag.</div>