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Official statement

Google has announced new meta tags that allow publishers to define the amount of preview content shown in search results. These tags cover the number of characters, the size of image previews, and the duration of videos.
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Extracted from a Google Search Central video

⏱ 5:18 💬 EN 📅 26/09/2019 ✂ 3 statements
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Official statement from (6 years ago)
TL;DR

Google introduces new meta tags that theoretically allow publishers to control the amount of content displayed in the SERPs: snippet length, image size, video duration. In practice, this provides an additional control lever over the presentation, but keep in mind that Google is never obliged to follow your directives. The challenge? Optimize CTR without naively relying on absolute compliance from the algorithm.

What you need to understand

What exactly do these new meta tags offer?

Google has rolled out a series of meta tags that control the previews displayed in search results. These tags cover three areas: the character count of the text snippet, the size of the previewed images, and the maximum duration of video snippets.

Specifically, you can now indicate to Google whether you want a short, medium, or long preview for your content. The same logic applies for images and videos: specify whether you prefer a modest thumbnail or a more prominent visual. The official idea is to give publishers a say in how their content is presented in the SERPs.

Why is Google offering this now?

That’s the million-dollar question. Google has always maintained near-total control over presentation of the results — meta descriptions ignored, featured snippets generated on the fly, images randomly picked. Why this change?

Two hypotheses. First possibility: the pressure from publishers and regulators, particularly in Europe, demanding more transparency and control over content display. Second possibility: Google needs certain content (paid, sensitive, legal) to limit its exposure in previews — and rather than handle this on a case-by-case basis, they’re outsourcing the responsibility to publishers.

What should you keep in mind before jumping in?

These tags are guidelines, not orders. Google explicitly reserves the right not to follow them. You may request a short snippet, but the algorithm might decide that a long excerpt serves the user better — and it will override your request.

Another point: these tags add a layer of technical complexity to manage. If you operate a site with thousands of pages, automating these parameters according to content type requires deep consideration. Poorly calibrated, they may harm CTR instead of improving it.

  • These meta tags guarantee nothing — Google remains in control of the final display
  • They aim to optimize the presentation of content in the SERPs, especially for sensitive or paid content
  • Their real effectiveness will need to be measured through GSC by comparing CTR before/after implementation
  • They require a strategy: not all content benefits from the same settings

SEO Expert opinion

Does Google really respect these directives in practice?

Here’s the tough question. Google has a checkered history of ignoring guidance provided by publishers. The meta description? Ignored in 60 to 70% of cases according to studies. The nosnippet? Circumvented by generating featured snippets in other ways. Why would these new tags be any different?

The initial field feedback is mixed. Some sites report a partial adherence to the directives, while others see no change at all. The reality is, Google optimizes for the overall CTR, not for your editorial preference. If the algorithm detects that a long snippet performs better for a given query, it will ignore your tag. [To be verified] — no official data quantifies the compliance rate of these tags.

In what cases do these tags offer a real advantage?

Three scenarios stand out. First case: premium or paid content that needs to limit exposure to entice clicks (news sites, subscription platforms). Second case: sensitive or legal content where a too-detailed preview poses problems (health, finance, legal). Third case: e-commerce product pages where the image should take precedence over text.

In all other contexts — standard informational content, blogs, category pages — the impact remains marginal or even counterproductive. An overly short snippet can cause CTR to drop if the user doesn’t have enough information to gauge relevance. Test on a case-by-case basis, never in a “let's activate everywhere and see” mode.

Should you invest time in this now?

Let’s be honest: this is not a strategic SEO priority for 90% of sites. If your fundamentals are shaky — technical structure, internal linking, content quality, backlinks — implementing these tags is merely a gimmick.

However, if you run a mature site with a high volume and a well-refined SERP display strategy, then yes, testing these tags might yield a few extra CTR points. But again: measure, compare, iterate. Never deploy en masse without a testing phase.

Warning: implementing these tags without a clear strategy may degrade your CTR. Google favors what performs well overall, not what you prefer to display. Test on a sample before generalizing.

Practical impact and recommendations

How to implement these meta tags in practice?

The technical implementation is straightforward: it involves standard meta tags to be inserted into the <head> of your pages. For the text snippet, you would use values like max-snippet:[number] to limit the character count, or max-snippet:-1 to leave it open to Google.

The same logic applies for images with max-image-preview:[none|standard|large] and for videos with max-video-preview:[number]. The problem is the deployment at scale. On a site with 10,000 pages, manually setting these parameters is unrealistic. You need to automate it through your CMS or SEO plugin by creating rules based on content type, category, or tag.

What mistakes should you absolutely avoid?

First mistake: deploying these tags in a “one size fits all” fashion. A short snippet can kill the CTR of an informative blog post, while a long snippet might hurt that of premium content. Segment by content type before setting anything up.

Second mistake: never measure the impact. These tags are useless if you don’t track their effect on CTR via Google Search Console. Compare performance before/after on significant samples — at least 30 days of data, enough traffic to rule out statistical noise.

What should you check after implementation?

First step: inspect the URL via GSC and verify that Google correctly detects the tags. Next, monitor the CTR progression page by page, isolating the pages where you modified the parameters. If CTR drops, roll back — that’s a sign that Google was displaying better without your input.

Second check: monitor the appearance rate of rich snippets and featured snippets. Some field feedback suggests that limiting the snippet may reduce the chances of appearing in position zero. If that’s an important traffic source for you, be cautious.

  • Segment your content by type before defining a parameterization strategy
  • Test on a representative sample (10-15% of the site) before global deployment
  • Measure CTR before/after via GSC over at least 30 days of comparable data
  • Regularly inspect modified URLs to verify that Google follows your directives
  • Document rules applied by page type for easier future maintenance
These new meta tags provide an additional optimization lever, but effective implementation requires a methodical and segmented approach. Poorly calibrated, they can harm CTR rather than improve it. The challenge is to test, measure, adjust — never to deploy blindly. If the technical or strategic complexity of this optimization overwhelms you, it may be wise to consult a specialized SEO agency that can audit your site, define an adapted SERP display strategy, and rigorously handle testing.

❓ Frequently Asked Questions

Ces meta tags sont-ils vraiment respectés par Google dans tous les cas ?
Non. Google se réserve explicitement le droit de ne pas respecter ces directives si l'algorithme estime qu'un autre format d'aperçu sert mieux l'utilisateur. Les retours terrain montrent un respect partiel, variable selon les requêtes et les contenus.
Faut-il appliquer ces tags sur toutes les pages de mon site ?
Absolument pas. L'efficacité de ces tags dépend du type de contenu. Un snippet court peut tuer le CTR d'un article informatif, tandis qu'il peut protéger un contenu premium. Segmentez par typologie avant de paramétrer.
Comment mesurer l'impact réel de ces meta tags sur mon trafic ?
Comparez le CTR avant/après via Google Search Console sur au moins 30 jours de données, en isolant les pages modifiées. Assurez-vous que le volume de trafic est suffisant pour écarter le bruit statistique.
Limiter la longueur du snippet peut-il nuire à mon positionnement ?
Ces tags n'affectent pas directement le ranking, mais un CTR dégradé peut indirectement nuire au positionnement à moyen terme. Si votre snippet devient moins attractif, le trafic baisse, et Google peut en tirer des conclusions.
Peut-on utiliser ces tags pour éviter que Google affiche des featured snippets ?
Oui, en limitant fortement le snippet avec max-snippet:0 ou nosnippet, vous empêchez l'affichage de featured snippets. Mais vous perdez aussi toute visibilité de votre contenu dans les SERP — à utiliser avec extrême précaution.
🏷 Related Topics
Domain Age & History Content AI & SEO Images & Videos

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