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Alt text

The short text description of an image that screen readers read aloud and Google uses to understand your visual.

By Tanguy De Keyzer · Founder & digital strategist

Alt text is the short description you give to an image in the code. Screen readers read it aloud to visually impaired visitors, and Google uses it to understand what is on your visual.

What exactly is alt text for?

Alt text does two things at once. For accessibility it describes the image to those who cannot see it, and it also appears when an image fails to load. For SEO it gives Google context, because a search engine sees no picture, only the text around it. Good alt text helps your visuals rank in Google Images and strengthens the relevance of the whole page. One line of text serving two goals, and both count.

How do you write good alt text?

Describe what is genuinely visible, in a short and concrete sentence. Write “a truck unloading pallets at a distribution centre” instead of “image1”. Do not stuff it full of keywords, because that reads artificially and Google sees through it. Decorative visuals without content get an empty alt so screen readers skip them. Keep it factual: alt text is a description, not an advertising message. Just as with your heading tags, it is about clarity, not filler.

Why Customer Impact values it

In B2B alt text looks like a small detail, but it fits into a larger line: an honest, accessible website that works for everyone. We fill in alt texts because they improve the experience for those who use a screen reader and because they are taken into account in the signals Google gathers about your site. It is not a trick to force ranking, but part of solid craftsmanship that, together with page speed and clear structure, makes the difference. Small care, lasting effect.

From theory to growth.

We turn Alt text into measurable results for your business.