Are links on images without alt text really understood by Google?

Does Google really make a distinction between image links and text links?

Google's official response is clear: image links are treated the same as text links mechanically. The crawl follows the href, PageRank flows, and the relationship between pages is established. Technically, a link remains a link, whether the clickable element is text or an image.

The issue lies elsewhere: without alt text, Google cannot extract semantic context. A text link contains its own context in the anchor ("best e-commerce CMS," "technical SEO guide," etc.). An image without alt is like a link with an empty anchor: Google knows it exists, it follows it, but it ignores what it refers to.

Why is the context of the link so important?

The semantic context of a link directly influences the relevance and weight it transfers to the destination page. Google uses anchors to understand what the target page is about, refine its thematic classification, and strengthen its ranking on specific queries.

When an image link lacks alt text, Google loses that information. It cannot associate the link with a specific lexical field. The SEO juice passes, but the semantic value is diluted or non-existent. It's equivalent to a link with a generic anchor like "click here": technically valid, semantically poor.

What happens when alt text is present?

As soon as relevant alt text is added, Google treats the image link exactly like a standard text link. The alt becomes the de facto anchor. If your image points to a product page and the alt describes the product, Google understands the semantic relationship between the two pages.

This means that the alt text must follow the same optimization rules as text anchors: be descriptive, contain relevant keywords without over-optimization, and reflect the content of the target page. A vague alt or one filled with keywords disconnected from the visual contributes nothing and can even be counterproductive.

• Image links without alt are followed by Google, but their semantic context is lost
• Alt text plays the role of a text anchor and should be optimized accordingly
• An image link with relevant alt = a standard text link in the eyes of Google
• PageRank flows in any case, but the semantic value depends on the alt
• Avoid generic or over-optimized alts on strategic image links

Is this statement consistent with real-world observations?

Yes, and it's one of the few Google statements that aligns perfectly with practical testing. Internal linking audits regularly show that pages linked only through images without alt perform less well on targeted queries, even with a good external link profile. The juice passes, but the thematization is unclear.

I have seen cases where systematically adding alt text to product blocks (clickable grid images) generated ranking gains on specific long-tail queries within a few weeks. The semantic signal provided by the alt really makes a difference, especially in competitive sectors where every micro-signal counts.

What nuances should be considered?

Google does not specify how it weighs an alt text on an image link compared to the surrounding text. On a product sheet, if the image link has an alt "blue men's running shoes" and the title next to it says "Nike Air Zoom Pegasus 40," which carries more weight? [To be verified], but experience suggests that the alt prevails for the image itself, while the adjacent text contributes to the overall context.

Another point is that over-optimization of alt texts on image links is possible. Stuffing each alt with the same exact keyword across 50 different products creates a suspicious pattern. Google detects these schemes and may devalue the signal. The alt should remain natural, descriptive of the visual, and varied.

In what cases does this rule have the most impact?

E-commerce sites and content galleries are the most affected. A site with 80% of its internal linking driven by product thumbnails without alt loses a major semantic lever. The same applies to blogs that use clickable featured images without descriptions: the link exists, but the thematic context is absent.

Conversely, on a corporate site with few image links and a dense text linking, the impact is marginal. Prioritize the optimization of alt texts where image links are strategic: main navigation, product blocks, carousels, illustrated contextual linking.

What should you do practically on your site?

Prioritize auditing areas where images serve as main links: category pages, product cards, illustrated menus, "similar articles" blocks. A Screaming Frog or Oncrawl crawl will list img tags without alt in a href elements. It's an easy quick win.

Then, define an editorial guideline for your alt texts. The alt must describe what the image shows AND provide context about the target page if it differs from the image itself. Example: an image of blue sneakers pointing to a detailed product sheet should have an alt like "Nike Air Zoom blue running shoes" instead of "product image" or "sneakers".

What mistakes should be avoided at all costs?

Do not copy-paste the same alt on all images in a category. Repeating "product" 200 times is noise, not signal. Google sees the pattern and likely ignores those alts or devalues them. Vary, be specific, but remain natural.

Avoid keyword stuffing disguised as well: an image link alt is not a meta keywords. "Cheap Nike Adidas Asics men's running shoes promotion" on an image of Nike sneakers will be caught in two seconds. Stay descriptive, add one or two relevant keywords if the context justifies it, end of story.

How to verify that the optimization works?

After deploying alt texts, monitor the evolution of rankings on long-tail queries targeted by your image anchors. Google Search Console can show you gains in impressions for terms you've included in your alts. It's an indirect but telling signal.

Also, use a log analysis tool to verify that Googlebot is indeed following the optimized image links and crawling the target pages more frequently. More regular crawling of previously under-crawled pages after adding relevant alts confirms that the semantic context has changed the game.

• Crawl the site to identify all image links without alt text
• Prioritize strategic areas: navigation, product sheets, contextual linking
• Draft descriptive and varied alts, without keyword stuffing
• Integrate 1-2 relevant keywords when the context justifies it naturally
• Avoid generic repeated alts ("image," "product," "photo")
• Track the evolution of rankings on long-tail queries targeted by the alts