ensures that visual content can be interpreted not only by people but also by search engines and AI systems. Since machines largely interpret images through text, descriptive textual information is crucial.

The most important building blocks include:

  • that describes an image's content or function in the alt attribute,
  • descriptive file names instead of generic names like IMG_1234.jpg,
  • surrounding context such as captions and relevant body text,
  • for data graphics, a textual or tabular explanation.

Image is not a ranking hack. Good image descriptions mainly improve clarity, accessibility and the chances in Google Images. More traffic is possible but also depends on image quality, demand, competition and .