Which Tag should not use for SEO Optimization ?

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SEO Help and Tips

Which Tag should not use for SEO Optimization ?

HTML tags that should never be used universally, there are certain HTML tags that have been deprecated, have limited browser support, or are not recommended due to security or accessibility concerns. Here are some tags that are generally advised to be used with caution or avoided:

  • <font> tag: The <font> tag is deprecated and not recommended for use. Instead, use CSS to style text and apply font properties.

  • <center> tag: The <center> tag is also deprecated. Use CSS to center-align elements instead.

  • <marquee> tag: The <marquee> tag is deprecated and should be avoided. It is used to create scrolling or moving text, but it is not considered a good practice for modern web development. Use CSS animations or JavaScript for similar effects.

  • <blink> tag: The <blink> tag is a non-standard tag that causes text to blink. It is not recommended for use as it can be distracting and annoying for users.

  • Inline event handlers (e.g., onclick, onload): Although not specific tags, using inline event handlers directly in HTML attributes is considered bad practice for separation of concerns. Instead, prefer using unobtrusive event binding through JavaScript or libraries like jQuery.

  • <iframe> without proper security measures: When using <iframe>, be cautious about security implications. Avoid embedding content from untrusted sources or without proper validation to prevent cross-site scripting (XSS) attacks.

  • Deprecated and non-standard tags: There are various other tags that have been deprecated or are non-standard, such as <basefont>, <isindex>, <nobr>, etc. It's generally recommended to avoid using such tags and adhere to modern HTML standards.

  • <applet> tag: The <applet> tag was used to embed Java applets in web pages. However, Java applets have become obsolete, and modern browsers no longer support them. It is recommended to use alternative technologies, such as HTML5 and JavaScript.

  • <b> and <i> tags for styling: While the <b> and <i> tags can be used to apply bold and italic styles to text, it is generally recommended to use CSS styles (font-weight and font-style) instead. The <b> tag is semantically used to represent text with stronger importance, and the <i> tag is used for text in an alternate voice or mood.

  • <s> and <strike> tags: The <s> and <strike> tags were used to represent strikethrough text, but they are deprecated. Instead, use CSS (text-decoration: line-through;) to apply strikethrough styles to text.

  • <center> tag: Although mentioned before, it's worth reiterating that the <center> tag is deprecated. Use CSS to center-align elements (text-align: center;) instead.

  • <plaintext> tag: The <plaintext> tag is a non-standard tag that was used to render text as plain, ignoring any HTML tags. However, modern browsers do not support it, and it is considered obsolete. Use appropriate CSS styles or JavaScript to modify text rendering as needed.

  • <frameset> and <frame> tags: These tags were used to create web page layouts with frames, but they have become outdated. It is recommended to use modern layout techniques such as CSS Grid or Flexbox for creating flexible and responsive page layouts.


  • <big> and <small> tags: The <big> tag is used to increase the font size of text, and the <small> tag is used to decrease the font size. However, it is recommended to use CSS (font-size) for more precise control over text sizing.

  • <acronym> and <abbr> tags: The <acronym> tag is used to define an acronym, and the <abbr> tag is used to define an abbreviation. However, the <abbr> tag is preferred over <acronym> as per HTML5 specifications. It is recommended to provide appropriate explanations for acronyms and abbreviations for accessibility purposes.

  • <base> tag: The <base> tag specifies the base URL for all relative URLs within a document. It is commonly used in the <head> section of a web page. However, it is important to use this tag with caution and ensure that it is used correctly to avoid potential issues with relative URL resolution.

  • <map> and <area> tags: The <map> tag is used to define an image map, and the <area> tag is used to define clickable areas within the image. This allows different regions of an image to act as links. However, image maps have limitations, and it is often recommended to use alternative methods, such as CSS-based image overlays or individual <a> tags for each clickable area.

  • <dir> and <menu> tags: The <dir> tag represents a directory list, and the <menu> tag represents a list of commands or options. However, these tags have been deprecated in HTML5. It is recommended to use <ul> or <ol> for lists and style them accordingly.

  • <embed> and <object> tags: These tags are used to embed external content, such as multimedia files or external applications, within a web page. While they have their uses, it's important to consider browser support and potential security implications. Prefer modern standards like HTML5 <video>, <audio>, and <canvas> elements for multimedia content.

Always refer to the HTML specification and best practices to ensure the proper use and understanding of HTML tags. Keep in mind that the web development landscape evolves, and certain tags may become obsolete or deprecated over time.

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