What Is Alt Text?
Alt text, short for alternative text, is a brief written description that explains what an image shows. It’s usually added via your CMS or included in the HTML of an image. Think of it like a game of catchphrase, just say what you see.
Clear, concise alt text improves your site’s accessibility by helping screen readers describe images to visually impaired users. It also supports SEO by helping search engines understand your images and potentially boosting your visibility in Google Image Search, especially when relevant keywords are included naturally.
The SEO Benefits of Alt Text
Improved Search Visibility and Crawlability
Alt text allows search engines to interpret what your images are about. Without it, your content might not be fully understood, limiting your chances of appearing in relevant search results.
Better Accessibility
Google places value on accessible websites. A site that’s easier to navigate for all users typically benefits from better engagement and user experience signals, both of which can positively impact your SEO. You can test your website’s accessibility using tools like Google’s PageSpeed Insights.
Supports Your On-Page SEO Efforts
Alt text contributes to the topical relevance of a page. When used correctly, it adds helpful context and reinforces the subject matter of your content.
Common Alt Text Mistakes To Avoid
Keyword Stuffing
Overloading your alt text with target keywords might seem like a shortcut, but it’s bad practice. Not only does it reduce clarity for users, but it can also trigger spam signals that harm your rankings.
Leaving It Blank
If you don’t add alt text, screen readers and search engines won’t be able to understand your images. It’s a missed opportunity both for accessibility and SEO.
Vague Descriptions
Descriptions like “image1” or “photo” don’t provide any value. Your alt text should clearly explain what the image shows, in a way that’s helpful and specific.
Over-Describing
Alt text isn’t the place for full sentences or long-winded detail. If it’s too long, it can frustrate screen reader users and dilute any SEO value. A good rule of thumb is to stick to one sentence or phrase, ideally under 125 characters.
Example:
Too long:
"A high-quality image of a large black Labrador Retriever dog sitting in a sunny park near a tree while holding a red ball in its mouth during a summer afternoon."
Better:
"Black Labrador holding a red ball in a park"
Conclusion
Alt text is a small detail that can make a big difference to your website. It helps search engines understand your content, improves your chances of appearing in image searches, and makes your site more accessible to all users.
By keeping your descriptions short, specific, and relevant, you’ll avoid common mistakes and strengthen your SEO efforts at the same time. If you’re unsure where to start, consider reviewing your site’s images and updating any missing or weak alt text, it’s a quick win that can deliver long-term results.
Need help improving your on-page SEO? Get in touch with the team at FUZE Agency to book a site audit or SEO consultation.
