To access the Google AI Mode home screen, visit google.com/ai.
A disclaimer under the search box may appear, stating
Based on your Google activity. However, this only seems to show when signed into a Google account, as the company can only access past activity history when a user is logged in.
Google AI Mode utilizes search history and conversation history, likely to resume previous chats.
A default suggestion on the AI Mode page is also
Based on your Google activity.
Note: The author is currently offline for Simchas Torah.
Author's summary: Google AI Mode uses user activity for suggestions.