The Problem with JavaScript rendering
Googlebot expends a lot of processing power to execute JavaScript and fully render the page. AI crawlers like GPTBot or PerplexityBot often work more simply: they usually just download the raw HTML code. If your content is loaded in the browser via scripts (client-side rendering), the bot sees only an almost empty page.
GEO Best Practice:
Server-Side Rendering (SSR): Use frameworks like Next.js so that the server sends the finished content directly to the bot in HTML.
Static HTML: Important information such as product descriptions should always be directly in the source code, without requiring a script to be loaded.
Single-Page Applications (SPA) as an obstacle
Websites built as pure apps often consist of nothing more than an empty container in the source code. The actual text is only loaded later. This is risky for generative search: Since the AI finds no facts in the source code, it cannot cite you as a source.
GEO Best Practice:
Check hydration: Ensure that key information (prices, features, benefits) is immediately visible in the HTML code.
Pre-rendering: If you don’t use SSR, use tools that show bots a pre-rendered version of the page.
Proper configuration in robots.txt
A common mistake is incorrectly configuring the robots.txt file. Many companies block AI bots across the board to protect their data. However, it’s important to distinguish between two types of bots:
Training bots (e.g., GPTBot): These collect data for future model training.
Search bots (e.g., OAI-SearchBot): These search for information in real time to generate current chat responses.
If you block search bots, you’ll disappear from the source references of ChatGPT and similar platforms.
GEO Best Practice:
Precise blocking: Allow search bots access to your content, even if you restrict training bots.
Check log files: Regularly check whether bots from OpenAI or Perplexity encounter error messages.
Load times and file sizes
AI crawlers are optimized for speed. If a page takes too long to load content via JavaScript, the bot will abort the process. Additionally, there are often limits on file size. Very lengthy source texts, where the relevant content appears only at the very end, are often read only partially.
GEO Best Practice:
Lean HTML: Keep the HTML code lean and avoid unnecessary code bloat.
Put the important stuff at the top: Place the key information at the beginning of the document.
To appear in AI responses, your website must be technically accessible. Complex JavaScript solutions without server-side support are a dead end for most AI crawlers. If you want your content to be used as a source, you must serve it directly to the bot in the HTML code.
comdaily conclusion: Technical barriers are one of the most common reasons why brands remain invisible in AI systems. Today, a website must be immediately readable not only for humans but also for AI crawlers. With comdaily, you can check how visible your brand already is to AI models and which sources are particularly relevant.
