Visual search: image, context and product data.
There is no single “Lens SEO” button. An image becomes visible through a combination of a crawlable file, useful context, accessible alt text, a quality landing page and — for products — accurate Product and Merchant Center data.
From theory to a test
How models read an image
A simplified model of the tasks involved, their limits, and what cannot be claimed about Google's systems.
02Centerpiece annotation
Layout and page function as a signal: which component carries the purpose of the document.
FlagshipA practical guide
Two test images, a signal matrix and a protocol for checking after publication.
AccessibilityAlt text by context
A decision based on the function of the image, not a formula for stacking attributes.
Visual semantics has two halves
One half is the image itself: the file, its subject, its alt text and its context. The other is the page: its layout, its components and what it lets the reader actually do. Most writing on this topic covers only the first.
The second half matters more often than it gets credit for. Which component occupies the first screen tells a system what the page is for — and that judgement comes before any assessment of how good the content is. That is the subject of the centerpiece annotation page, and it is the bridge between this section and the textual one.
What is confirmed and what is a recommendation?
| Claim | Status |
|---|---|
| Google combines alt text, page content and computer vision to understand an image. | Documented Google guidance. |
| A descriptive file name helps. | Google describes it as a very light signal. |
| Google reads IPTC fields for rights and licensing. | Documented Google guidance. |
| A clean background always ranks better. | Not a universal rule; test it against the query type and the product. |
| Image and text alignment is an E-E-A-T signal. | Should not be presented as a documented E-E-A-T metric. |
| Moving a component higher on the page improves rankings. | Our working assumption, not a measured result. See the limits on the centerpiece page. |
This table is the honest summary of the whole section. Where a row says “documented”, we link the source on the relevant page. Where it says “working assumption”, we say so in the text rather than letting the reader infer certainty we do not have.