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 be visible when signed into a Google account.
This suggests that Google AI Mode utilizes search history and conversation history, likely to continue previous conversations.
Note: The AI Mode page provides default suggestions
Based on your Google activity.
Author's summary: Google AI Mode uses user activity for suggestions.