A recurring issue in image seo and descriptive text is easy to describe: charts have images but no accessible explanation. Resolving it requires checking the underlying condition as well as the visible result.
Find the likely cause
Important values exist only inside pixels.
Treat this as an explanation to verify against the actual work. Look at the input, the relevant decision, and the final result together. If the evidence does not support this diagnosis, investigate the mismatch before applying a convenient but unrelated fix.
Make the targeted correction
Provide a nearby text explanation or data table for the key information.
Images should contribute to the page's explanation and remain understandable in the contexts where readers encounter them.
Check that the repair worked
Confirm that the conclusion is understandable without seeing the chart.
Repeat the check on the final version that the reader or customer will encounter. An approved draft, a preview, and a published result can differ; the acceptance decision should concern the version people actually use.
Prevent the next related failure
A separate issue to watch for is this: image captions make claims the image cannot establish. Separate observed details from broader claims requiring sources.
Monitor the useful outcome
Track image loading issues, accessibility defects, and whether illustrations help readers complete the task.
Keep a short record of the original symptom, the evidence behind the diagnosis, and the result of the acceptance check. That record makes the solution reusable when the same condition appears again, without assuming that every superficially similar problem has the same cause.
Official reference for the platform or standard discussed: W3C WAI: image alternatives.