Alt text
The alt attribute describing an image's content and function for screen readers, for cases where the image fails to load, and for image…
SERP FeaturesImage results block
Image pack
A horizontal or grid block of image results embedded within the web SERP, linking through to Google Images.
In full
Images qualify through the usual image indexing signals: crawlable and indexable files, descriptive filenames and alt text, relevant surrounding content, and structured data where applicable. Google Images results show the source page, so the traffic value depends on the click continuing to the site. Lazy loading implemented in JavaScript that crawlers never trigger is a frequent reason images are missing entirely.
Example
A product photography set ranks in the image pack for a model number because filenames, alt text and captions all name it.
Related terms
Image and video sitemap extensions
Namespace extensions to XML sitemaps that declare images and videos associated with a page so they can be discovered for Images and Video…
Lazy loading
Deferring the download of offscreen images and iframes until they are near the viewport, using the native `loading="lazy"` attribute or…
SERP
The page a search engine returns for a query, combining organic results with ads, rich results, AI-generated answers and vertical modules.
WebP
A Google-developed image format supporting lossy and lossless compression plus transparency and animation, typically 25-35% smaller than…