Improved readability: H3 tags help break down content into smaller, more specific sections, making it easier for users to read and navigate through the text.

SEO benefits: Using H3 tags appropriately can improve the search engine optimization of a webpage by signaling the structure and importance of the content to search engines.

Accessibility: Proper use of H3 tags enhances the accessibility of a webpage, helping screen readers to better interpret and convey the structure of the content to visually impaired users.

Overuse can clutter: Overusing H3 tags can lead to a cluttered and confusing layout, diminishing the user experience.

Misuse impacts SEO: Incorrectly using H3 tags, such as using them for styling purposes rather than for structure, can negatively affect the SEO performance of a webpage.

Design limitations: H3 tags come with default styling that may not always align with the design needs of a webpage, requiring additional CSS adjustments.