AI Stress Test of Your Website – 10 critical elements blocking results in 2026

5min.

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30 December 2025

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In 2026, organic traffic from Google isn't everything! Users also make decisions at the level of AI Overviews or AI Mode, as well as during conversations with LLMs such as Perplexity, ChatGPT, or Copilot. The algorithms of all these tools won't mention brands that, in their "eyes," aren't worth it. The winners will be those who pass the AI Stress Test, meaning they address 10 fundamental elements important from an AI perspective. Find out more!

5min.

Comments:0

30 December 2025

1. Lack of brand credibility signals

In generative models, high-quality content is not enough. What happens outside the website is also important. AI searches the web for signals confirming a brand’s credibility.

These could be mentions on industry portals or high-authority sites, brand accounts on social media, or expert profiles on LinkedIn. If such signals are missing, the brand will not be cited, meaning users won’t encounter it during their research stage.

What does this mean for your business? Fewer citations and mentions in AI tools mean a lower share in customers’ purchasing decisions.

2. Content generated by JavaScript

Google handles this much better now, but AI tools still don’t necessarily do so. We are talking about content loaded on the page using JS. LLM models only see the raw HTML code of the page, so if you load part of your content dynamically via JS, the model won’t see it. If you use such solutions, it is best to transform them so that the most critical text fragments are visible in the HTML code.

The effect? Even if you have great content on the page, technical issues may prevent bots from accessing it.

3. Outdated content

Content freshness is vital for AI tools. All models are programmed to give the user the best, most reliable, and probable answer possible. Therefore, any signals indicating that the content is current work in your favor regarding AI citability.

What to do so models don’t consider your content outdated?

  • Review older articles and update them with new information.
  • Add, for example, one header and paragraph “Update on topic X in 2026”.
  • Revise the article introductions and include refreshed information and data directly there.
  • After such an update, also change the publication date to the current one, or the “last updated” date if you have that option.
What does outdated content mean for your business? The risk of absence in AI Overviews and answers prepared by LLM models.

4. Weak product and category descriptions (too short, mass-generated)

Many companies have abandoned content created by copywriters in favor of content generated en masse by AI tools. This applies especially to product and category descriptions, which are quite schematic. Does the problem lie in the AI support itself? No. Usually, these texts simply lack the so-called “human touch”—human verification of content, language correction, or adding at least a few sentences.

Generative models are excellent at detecting which content is shallow, not exhaustive, and generated with the help of artificial intelligence. Therefore, AI tools reward the uniqueness of descriptions, not copying content from the manufacturer or generating it in bulk.

What does this mean for your business? If your product and category descriptions are weak, there is a high probability that your page won’t appear in recommendations from LLM models, which can lead to lower sales.

5. Content written for “old SEO”

Keyword stuffing, i.e., artificially stuffing keywords into texts, was a common practice 10 years ago. Just as it sometimes worked back then, now—absolutely not, both regarding Google and AI models. Despite this, for many people, SEO has become synonymous with inserting keywords, preferably in an uninflected form, wherever possible. Now, in both SEO and AISO, this can hurt more than it helps.

AI models require reliable, substantive content that presents the topic comprehensively. This is much more important than the number of keywords, so when creating content, focus on answering users’ questions about a given topic. This will increase your chance of being cited.

What if your content is written with old SEO rules in mind? It won’t bring any organic results, neither in Google nor in AI tools. Put the user first when creating content, not the keywords.

6. Too slow website and poor Core Web Vitals results

Users don’t like to wait. AI models feel the same. If your site loads too slowly or you have poor Core Web Vitals, it is very possible that AI will give up on downloading information from your site. How to check if you have a problem in this area? Use this tool: https://cruxvis.withgoogle.com/, which will show you what CWV looks like on your site.

An unstable site and slow-loading content are technical blocks that can impact your site’s lower exposure in AI results.

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Robert Smalarz Senior Web Developer

7. Chaos in navigation and site structure

If your site lacks a straightforward menu that connects all the most important pages, and some landing pages are unavailable via internal linking (orphan pages), both users and the AI model may not find the needed information. From a UX and AISO perspective, it is worth considering whether your site’s navigation is intuitive and whether the most important pages are easily accessible.

Does your site have unreadable navigation? There is a high risk that AI models will choose the competition, which will be simpler to interpret.

8. Mismatched and non-standard CTAs (lack of convertibility)

In generative models, high-quality content is not enough. What happens outside the website is also important. AI searches the web for signals confirming a brand’s credibility.

These could be mentions on industry portals or high-authority sites, brand accounts on social media, or expert profiles on LinkedIn. If such signals are missing, the brand will not be cited, meaning users won’t encounter it during their research stage.

What does this mean for your business? Fewer citations and mentions in AI tools mean a lower share in customers’ purchasing decisions.

9. Lack of photos and graphics on the page

If you don’t enrich your articles with photos or graphics branded with your logo, you’re missing out on potential citations! Both LLM models and AI Overviews willingly show different graphics. After all, it is often a faster and more convenient way for the user to absorb information. Therefore, create your infographics and add them to the site’s content.

Remember to always place your logo in one of the corners—if the graphic appears in AIO, many users may see it. And even a glance at the logo helps in building brand recognition!

10. Lack of clear, expert conclusions at the beginning of the content

LLM models love summaries! Their answers very often include bulleted key findings, so when looking for information sources, they willingly pay attention to this format.

If you summarize your text and gather all the most important conclusions, especially at the beginning of the content, AI tools will cite your page specifically!

How can a marketer use the AI Stress Test in practice?

All these points gathered together as a verification checklist are a tool, thanks to which you can:

  • Quickly diagnose why the current strategy isn’t working and why visibility in AI is missing,
  • Enter 2026 with an advantage over your competition,
  • Create an AISO/SEO/UX roadmap without guessing, based on the real problems of your site,
  • Convince the CFO to invest in specific actions, based on data.

This test will let you verify things that aren’t visible in Google Analytics!

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Wojciech Urban
Wojciech Urban Senior SEO R&D Specialist

Do you want to know how your site performs in the AI Stress Test?

At Delante, we can help you accurately analyze how your brand is visible in AI tools such as Perplexity, ChatGPT, Copilot, or AI Overviews. That is precisely where purchasing decisions will be made in 2026!

If you want to:

  • Check if models see your brand at all,
  • Understand why conversions on your site aren’t growing,
  • Get concrete AISO/SEO/UX recommendations for the next 3 months,
  • Know the 10 critical points blocking visibility and sales,

We will prepare an AI Stress Test for your website!

It’s a quick diagnosis of whether your brand is ready for Search in 2026. Contact us, and we will gladly help!

CHECKLIST: AI Stress Test of Your Website (10 points)

Let us know how many points your site scored. In this case, the more points, the worse it is!

  • Lack of brand credibility signals (mentions in industry portals and other sources, actively managed social media profiles).
  • Content on the site is generated by JavaScript.
  • Outdated content.
  • Weak product and category descriptions (copied from manufacturers, mass-generated).
  • Content written “for SEO” (keyword stuffing, unnatural, uninflected phrases).
  • Slow site performance and poor Core Web Vitals scores.
  • Chaos in navigation and site structure.
  • Mismatched CTAs on the site.
  • Lack of photos and graphics on the site.
  • Lack of expert conclusions at the beginning of content.
Author
Wojciech Urban - Senior SEO R&D Specialist
Author
Wojciech Urban

Senior SEO R&D Specialist

R&D specialist in SEO and web analytics. He feels most comfortable in the area of technical SEO, and his main task is to ensure that websites are optimized for search engines and achieve high rankings in search results.