Headings and labels describe topic or purpose.
What the issue is
Using heading tags (h1, h2, h3, etc.) for styling purposes rather than to structure content hierarchically misleads users who rely on assistive technologies. For example, choosing an <h4> tag because it visually matches the desired text size, despite it being a primary section title that logically should be an <h1> or <h2>. This misuse of headings disrupts the document's structure, leading users to misinterpret the level of importance of various sections on the page.