Tharindu Gunawardana from Search Ministry has discovered a cool feature in Vertex AI:
Looks like we can now test and fine-tune AI Mode in Vertex AI > Vertex AI Mode, using our own website content. This also confirms the process of how AI Mode works (Simplified version )
Prepare > Retrieve > Signal > Serve
I’ll be investigating it and documenting my progress on this page.

Website search app configuration
Enterprise edition features
In addition to the standard features, you get:
- Extractive answers – answers that are extracted verbatim from your documents
- Image search, where you can use an image as a query
- Website search
- Core generative answers
Turning on Enterprise edition features is required for website search. To get higher refresh frequency, lower latency, search summaries and more features in addition to website data, you need to turn on advanced website indexing.
You can change this setting at any time.
After turning on Enterprise features, it can take up to five minutes for the features to become available.
Learn more about features and prices
Advanced LLM features
For structured, unstructured and advanced website search, you get:
- Search summarisation
- Search with follow-ups
- Advanced generative answers
Advanced LLM features are not available for basic website search.\n You can change this setting at any time.
After turning on advanced LLM features, it can take up to five minutes for the features to become available.
Learn more about features and prices
Basic Setup Steps






Search type
Select the type of search experience that the widget provides.
Search with follow-ups

Large language models for summarisation
Try out different models to see which one works the best for youStable
Default model. Learn more about the current default model Gemini 2.0 Flash 1 new
The Vertex AI gemini-2.0-flash-001 model with additional training for Q&A taskGemini 1.5 Flash 2
The Vertex AI gemini-1.5-flash-002 model with additional training for Q&A taskGemini 1.5 Flash 1 V2
The Vertex AI gemini-1.5-flash-001 model with additional training for Q&A task (version 2)Gemini 1.5 Pro preview
The Vertex AI 1M token context window model. Learn more about Gemini 1.5 Pro
Customise the summary
Give instructions to customise the tone, style and verbosity of the generative summary
Summary language preview
Choose the language of the summary
English
Enable related questions
Controls whether the generative summary suggests related questions.
Ignore no answer summary for query
Don’t show ‘We do not have a summary for your query’ if the query returns no answers for non-product questions on the widget.
Ignore adversarial query
Prevent LLM answers on adversarial queries.
Ignore low relevant content
Prevent LLM answers with low relevant content.
Image in answers preview
Choose a source for the image returned in the answer

No results are available until Google’s datastore indexes the content.

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