Guide: Importance of Alt Text for SEO & Accessibility

Understanding Alt Text in HTML

In this guide, we will delve into the world of alternative text, commonly known as alt text. You will discover what alt text is, why it is crucial for on-page SEO, how to use it effectively, and more.

What Is Alt Text?

Alt text is a short, descriptive text that is embedded in the HTML code of an image. Its primary purpose is to provide a textual description of the image in cases where the image cannot be displayed.

Uses of Alt Text

Originally, alt text was developed to describe images that could not load due to slow internet connections. Today, alt text plays a crucial role in enhancing website accessibility and helping search engine bots understand the content of images.

Alt text is particularly important for people with disabilities, such as those using screen readers, as it enables them to comprehend the visual content of a website.

Why Alt Text Is Important

Alt text is essential for on-page SEO optimization, as it helps search engines index and rank images accurately. Properly optimized alt text can improve a website’s visibility in Google image searches, driving more traffic and potential customers.

Moreover, alt text is a key component of website accessibility, ensuring that all users, including those with disabilities, can access and understand the content of a web page.

Common Alt Text Mistakes

Some common mistakes related to alt text include keyword stuffing, using generic descriptions, or neglecting to include alt text altogether. By avoiding these pitfalls and following best practices, you can enhance your website’s SEO and accessibility.

Writing Effective Alt Text

When writing alt text, it is essential to describe the image accurately without overloading it with keywords. Keep the description concise yet informative, and avoid redundant phrases like “this is an image of.” By following these guidelines, you can create alt text that benefits both users and search engines.

Troubleshooting Alt Text

To check the alt text of images on a website, you can use tools like the Web Developer Chrome extension or crawlers like Screaming Frog. These tools allow you to inspect alt text in bulk and identify any missing or improperly written descriptions that need correction.

Remember, alt text may seem like a small detail, but its impact on SEO and accessibility is significant. By implementing effective alt text strategies, you can improve your website’s performance and user experience.


What is the purpose of alt text in HTML?

Alternative text, or alt text, serves two main purposes in HTML. Its primary function is to provide a textual description of an image if it cannot be displayed. This text can help users understand the image content when technical issues prevent it from loading or if they use a screen reader due to visual impairments. Additionally, alt text aids search engine bots in understanding the image’s subject matter, which is critical for SEO, as indexing images correctly can enhance a website’s visibility in search results.

Can alt text improve website accessibility?

Yes, alt text is vital for website accessibility. It translates visual information into descriptive text that can be read by screen readers used by users with visual impairments. By accurately describing images, alt text ensures that all users, regardless of disability, can understand the content of a web page, making the web more inclusive and accessible to everyone.

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