The Dead Simple Markdown Guide to HTML | HackerNoon
Briefly

Many Markdown applications allow you to use HTML tags in Markdown-formatted text, helpful when preferring HTML for elements like images or changing attributes.
For security reasons, not all Markdown applications support HTML in Markdown documents, so it's crucial to check your application's documentation for tag support.
When using HTML in Markdown, ensure to separate block-level HTML elements like <div> and <p> with blank lines to maintain proper formatting.
It's important to note that Markdown syntax cannot be used inside block-level HTML tags, meaning structures like <p>italic and **bold**</p> won't render correctly.
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