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DEV-IDX-04Should4 of 13 in IDX

Allow full snippets and large previews with max-snippet:-1 and max-image-preview:large

Level
Should

Recommended: skip it only for a reason you can name.

Documentation

Documented

At least one cited Google document states or supports it.

Area
IDXIndexing and snippet controls
Covered

Automatic

Decided from one URL.

Why it matters

Robots meta rules can make a page more visible than having none. max-image-preview:large allows the largest image previews, which matters mainly in Discover, and max-snippet:-1 removes the length limit so Google picks the length it finds most effective. Google's closing slide on robots meta tags recommended exactly these two rules for maximum visibility.

How to meet it

Add <meta name="robots" content="max-snippet:-1, max-image-preview:large"> (optionally with max-video-preview:-1) to every indexable template unless licensing requires limits, and check that no CMS, SEO plug-in or CDN feature adds lower limits by default. Provide large, high-quality images, at least 1,200 px wide for Discover.

How to test it

curl the HTML of each template and check the robots meta content; the Discover performance report in Search Console shows impressions for article templates.

How Regensbot covers it

AutomaticNeedsOne URL

Decided from one URL.

An audit reads the response, the headers, the HTML, robots.txt, the sitemaps and the structured data, and the finding shows the evidence it saw.

How verdicts workWhat you connect

Sources

Google documents02

  1. 01Robots meta tag, data-nosnippet, and X-Robots-Tag specificationsGoogle Search Central (opens in a new tab)
  2. 02Discover and your websiteGoogle Search Central (opens in a new tab)

Claims in the knowledge base08

  1. D2-C087ConfirmedControlling indexingShown on screen
  2. D2-C082ConfirmedControlling indexingShown on screen
  3. D2-C086SourceControlling indexingGoogle's documentation
  4. D2-C104ConsistentControlling indexingShown on screen
  5. D2-C053ConsistentControlling indexingShown on screen
  6. D2-C105n/aControlling indexingThe author's interpretation
  7. D3-C224ConfirmedUncovering Trustworthy Experiences on DiscoverShown on screen
  8. D2-C936ConsistentUsing images to your advantage and Engaging Search users with videosSaid on stage

Claim IDs refer to the Search Central Live 2026 knowledge base. The knowledge base (opens in a new tab)

Confirmed
Google's documentation states the same thing.
Consistent
Google's documentation supports it without stating it.
Source
The claim is the cited document itself.
n/a
Nothing to verify: a quotation, framing, opinion or analysis.

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