Text alternatives are used to describe images to people who are unable to see them. This includes people who use screen readers to access the web.
The text alternative should describe the image within the context of the page — letting visitors know what the image means and why it was included. It is important to not be too wordy and concise when adding the alternative text.
How do I fix this?
On Siteimprove it will direct you where this issue is, like below.
Make sure you are logged into your WordPress website and select the external link to the page this issue is occurring.
Once logged in edit the page and go to your text editor.
Finding image without a text alternative may look like this:
As you can see there is nothing in the Alt Text box. Adding text in the alternative text box will remove this issue, for this image you may use something like phew logo
Still, looking for further information?
Check out our handy video on how to add a text alternative to images or email us at support@phew.org.uk and we will be able to give further clarification on any questions.