If you've ever uploaded an image to WordPress and skipped right past the alt text field, you're not alone. It's easy to overlook. But that one small field does a lot for your site.
Alt text, short for "alternative text," is a written description of an image. It shows up in your HTML code, not on the page itself, so most visitors never see it directly. But it matters more than you might think, and skipping it can quietly cost you traffic, hurt accessibility compliance, and reduce AI visibility in search results.
Let's break down why alt text deserves your attention, and how to check yours without opening every single image one by one.
Alt text serves three main audiences:
Good alt text is specific and descriptive. Something like "volunteers packing food boxes at a community pantry" tells search engines and screen reader users a lot more than "IMG_4821.jpg" or nothing at all.
Search engines crawl your images the same way they crawl your text, and alt text is one of the main signals they use to understand what an image shows. That matters for a few reasons:
If you're already investing in content and keyword strategy, alt text is a low-effort way to reinforce it.
SEO gets a lot of attention, but there's a newer piece of the puzzle worth understanding: Generative Engine Optimization, or GEO. This is the practice of optimizing your content so that AI tools like ChatGPT, Google's AI Overviews, and other generative search engines can accurately understand, summarize, and cite it.
Just like traditional search engines, generative AI tools rely on the structured information around your content, including alt text, to understand what's on a page. If your images are unlabeled, you're giving these tools less to work with, which means less chance your organization's content gets surfaced or cited accurately.
Many sites emphasize that Alt Text is the single highest-leverage GEO signal for images, giving your site a lot of potential and room for growth with a strong Alt Text plan.
This is the piece that matters most on a human level, and the main reason why you should always use alt text with every image. Millions of people use screen readers to navigate the web, and alt text is often the only way they experience your images.
Think about a donor scrolling through your "Our Impact" page. Without alt text, a screen reader might skip right past the photos that show your programs in action, the volunteers, the people you serve, the results of your work. With alt text, that same donor gets the full picture, literally.
Beyond the ethical case, accessibility also has legal weight. The Americans with Disabilities Act (ADA) increasingly applies to websites, and missing alt text is one of the most common accessibility gaps found in web audits.
Checking alt text one image at a time works fine if you have a handful of images. Most WordPress sites don't. If you've been publishing for a while, you likely have hundreds or thousands of images in your media library, and going through them individually isn't realistic.
Here's a simpler approach:
This is exactly the kind of task Media Deduper Pro was built to simplify. Along with cleaning up duplicate and unused images, it flags media library items that are missing alt text, so you can find the gaps without digging through your library manually.
Once you know what's missing, you still have to write the descriptions. A few different approaches exist, depending on how hands-on you want to be:
Each approach trades off speed, cost, and control differently. Fully automated tools are fast and inexpensive but rely entirely on AI output. A managed service takes more of the work off your plate but includes a human review step before publishing.
Alt text is one of those details that's easy to skip and easy to underestimate. But it touches SEO, GEO, and accessibility all at once, which makes it one of the better returns on effort you'll find in routine site maintenance.
If your media library has grown out of control and you're not sure where to start, download the free Media Deduper plugin and run an audit. It's a fast way to see exactly where your alt text gaps are before deciding how you want to fill them.
