A picture might be worth a thousand words, but without proper optimization, search engines can't read any of them!
As a trusted leader in SEO and web performance, Americaneagle.com understands that the images on your site are more than just decoration; they are powerful assets for driving traffic and improving user experience. Many people wonder, "what is alt text?" and how it impacts their rankings. This simple but crucial element known as image alt text is just the beginning of effective image optimization.
In this blog, we’ll explore why optimizing your visual content is essential for both search engine visibility and digital accessibility. You will learn not only the fundamentals of alt text but also advanced techniques that go beyond the basics to help you boost your site's performance.
What is Alt Text and Why It Matters
Alt text is a written description of an image on a webpage that is embedded in the HTML code. Its primary purpose is to improve accessibility for visually impaired users who rely on screen readers to audibly describe the content of an image, ensuring they don't miss crucial information. In addition to accessibility, alt text plays a vital role in search engine optimization. When you ask, "what are alt tags in SEO?" the answer is simple: they provide context to search engine crawlers, helping them understand what an image is about and index it correctly for image search results. This can drive significant organic traffic and conversions.
Also, alt text enhances the user experience and page performance when images fail to load. Instead of an empty box, visitors will see the descriptive text, so the context of the page is not lost. By serving these dual functions for both humans and search engines, properly written alt text becomes a simple, but powerful tool for creating a more inclusive, discoverable, and user-friendly website.
What are Alt Tags in SEO?
The terms “alt text” and “alt tag” are often used interchangeably, but they are not the same. The correct term is “alt attribute,” which is part of the <img> tag in HTML and is written as alt="description of the image". This attribute provides alternative text for images, describing their content to improve accessibility and assist visually impaired users. The confusion arises because people mistakenly refer to the alt attribute as a “tag,” likely due to its placement within the <img> tag. Search engines like Google use the alt attribute to understand the context of an image, as they cannot “see” images the way humans do. By indexing the alt text, Google can associate the image with relevant search queries, improving both image search rankings and the overall SEO of the webpage.
Alt Text SEO Best Practices
Alt text SEO best practices focus on creating descriptive, concise, and relevant text that enhances both accessibility and search engine optimization. When writing an alt tag for SEO:
- Prioritize clarity by accurately describing the image’s content in a way that adds context to the page and aligns with the page’s content and purpose. For example, instead of vague phrases like “image of a product,” use specific descriptions such as “white running shoes with red soles.”
- Avoid keyword stuffing—while it’s important to include relevant keywords, forcing them unnaturally can harm your SEO.
- Keep alt text under 125 characters to ensure readability and avoid redundancy by not repeating information already conveyed in surrounding text.
- Don’t use phrases like “image of” or “picture of,” as search engines already recognize it as an image.
By following these guidelines, you can create alt text that improves accessibility while boosting your site’s SEO performance.
Common Mistakes to Avoid
When it comes to alt text, common mistakes can undermine both user experience (UX) and SEO efforts. Avoid the following:
- One frequent error is using filenames like “IMG1234.jpg” as alt text, which provides no context for users or search engines.
- Another is keyword stuffing—cramming alt text with irrelevant or excessive keywords, such as “best running shoes running shoes buy running shoes,” which not only confuses search engines but can also lead to penalties.
- Leaving the alt attribute blank is another major misstep, as it excludes visually impaired users and misses an opportunity to improve SEO. For example, bad alt text like “image of a product” is vague and unhelpful, while good alt text like “red running shoes with breathable mesh and white soles” is specific, descriptive, and relevant.
Poor alt text practices can frustrate users relying on screen readers and reduce your site’s visibility in search results, making it crucial to craft thoughtful, meaningful descriptions.
Examples of Strong Alt Text Descriptions
Strong alt text descriptions strike a balance between being concise, relevant, and contextual, ensuring they serve both accessibility and SEO purposes.
For functional images—those that convey important information—alt text should describe the image in a way that adds value to the content.
For example, in ecommerce, a poor alt text example for a product image might be “shoes,” while a strong alt text example would be “women’s black leather ankle boots with a 2-inch heel.” The latter is specific, descriptive, and provides context for both users and search engines.
In publishing, a bad alt text example for an article’s header image might be “book cover,” whereas a good one would be “cover of ‘The Great Gatsby’ featuring a blue background and glowing city lights.” These examples work because they describe the image in a way that aligns with the page’s purpose without being overly verbose.
For decorative images—those used purely for aesthetic purposes—alt text should be left empty using null alt text (alt=""). This tells screen readers to skip the image, preventing unnecessary interruptions for visually impaired users.
For instance, a decorative background pattern or a spacer image doesn’t need alt text, as it doesn’t contribute meaningful content.
By understanding when to describe an image and when to leave it blank, you can create alt text that enhances user experience while supporting SEO. Whether you’re in ecommerce, publishing, or any other industry, following these principles ensures your alt text is both functional and effective.
Beyond Alt Text: Using Descriptive Text and Image Attributes
While alt text is crucial for accessibility and SEO, other image attributes and descriptive text play a major role in optimizing your content. Elements like image file names, captions, and structured data provide additional layers of context that enhance both user experience (UX) and search engine visibility.
- For example, renaming a file from “IMG1234.jpg” to “blue-ceramic-coffee-cup.jpg” helps search engines understand the image’s content before even reading the alt text.
- Captions, which are often read more than the body text, can provide valuable descriptive text that complements the image and engages users.
- Structured data, such as schema markup, allows you to tag images with metadata, making it easier for search engines to display them in rich results.
Together, these image attributes and descriptive text not only improve clarity for users but also signal relevance to search engines, boosting your overall SEO performance.
Image Attributes That Influence SEO
Image attributes—like title, src, srcset, height, width—and loading play a pivotal role in modern image SEO, influencing both page performance and search engine crawlability.
- The src attribute specifies the image source, ensuring search engines can locate and index it
- The srcset attribute supports responsive design by providing multiple image versions for different screen sizes, improving user experience across devices.
- Defining height and width attributes helps browsers allocate space for images before they load, reducing layout shifts and improving Core Web Vitals scores.
- The loading attribute, set to “lazy,” defers offscreen image loading until needed, speeding up initial page load times.
- While the title attribute can add supplementary information, it’s less critical for SEO than alt text.
By structuring these attributes effectively in HTML, you not only enhance page performance and responsiveness but also ensure your images are optimized for both users and search engines.
How Optimized Images Improve Overall SEO Strategy
Optimized images are a cornerstone of a successful SEO strategy, directly impacting page speed, user experience (UX), and search engine rankings. Properly optimized images—through techniques like compressing file sizes, using descriptive image alt text, and defining dimensions—reduce page load times and prevent cumulative layout shift (CLS), a key metric in Google’s Core Web Vitals. This is especially important in a mobile-first indexing world, where Google prioritizes mobile performance when ranking sites. Additionally, optimized images enhance visibility in Google’s image search, which integrates with overall site SEO by driving traffic and improving relevance for targeted keywords. For example, using high-quality product images with detailed alt text can boost rankings in Rich Results, such as carousels, and features like Google’s Shopping tab, AI Overviews, Popular Products, or Shopping Knowledge Panels, making your content more discoverable.
A real-world example of the power of image SEO can be seen in ecommerce. After implementing optimized product images with descriptive alt text and structured data, a retailer saw a 30% increase in organic traffic and higher visibility in Google’s Shopping features. These optimizations not only improved their SERP rankings but also enhanced their presence in image-rich features like product carousels, driving more qualified leads.
By understanding how to improve SEO through image optimization, businesses can create a seamless user experience while maximizing their visibility across Google’s ecosystem, from traditional search results to visually-driven features.
How Americaneagle.com Helps Businesses Optimize Images
Americaneagle.com is a trusted partner for businesses looking to optimize their images and elevate their overall digital presence. With decades of experience in web development and digital marketing, we offer comprehensive image SEO services, accessibility audits, and performance enhancement strategies tailored to your unique needs.
Our team ensures your images are not only visually appealing but also optimized for search engines, improving page speed, user experience, and SERP rankings. Americaneagle.com’s blog and internal resources provide valuable insights into best practices, empowering businesses. Whether you need help with alt text, responsive design, or accessibility compliance, our expertise ensures your website performs at its best.
Ready to take your image optimization to the next level? Contact us today and let Americaneagle.com help you achieve your digital goals. Get Started
Related FAQs
What is alt text and why is it important?
Alt text is a written description of an image that improves accessibility for visually impaired users and helps search engines understand the image content, boosting SEO.
Can alt text improve my Google rankings?
Yes, well-crafted alt text can improve your Google rankings by enhancing image indexing and increasing your site’s relevance for targeted keywords.
How long should alt text be?
Alt text should be concise, ideally under 125 characters, while clearly describing the image’s content.
What’s the difference between image alt text and image title?
Alt text describes the image for accessibility and SEO, while the image title provides supplementary information, often displayed as a tooltip when hovering over the image.
Should all images have alt text?
Functional images should have descriptive alt text, but decorative images can use null alt text (alt="") to avoid distracting screen readers.
