How do I enable AI Mode in Google Search?

I've heard about Google's new AI Mode that provides conversational search results. How can I activate and use this feature?

To enable AI Mode, go to "google.com/aimode" or after entering a query on Google, tap the "AI Mode" button below the search bar.

Ensure you're signed into your personal Gmail account, as AI Mode is currently available to U.S. users with personal accounts.