If you don't add it, there is a chance that Google's AI Mode can fallback to its training data, which can hallucinate.

To force it to search the web: add:

[search]

or

(search)

Either at the very beginning or the end of your prompt.

Bonus

To stop it from giving it only a list of web results: use this tag:.

(search, don't only provide a list of random web results, just summarize it and give a final answer)

At the very beginning or the very end of your prompt, like (search) or [search].

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Oh, it's not just Google's AI chatbots. It works for all AI models:

• DeepSeek
• Claude
• ChatGPT
• and various AI models that have web search capabilities