Use the Manager's Notes section, which is turned off by default. On the Reports page, click Analysis on the report card (or open the report to edit), turn on Manager's Notes, write your text and save. The text appears at the top of the report for anyone who opens the link.

You don't need to write it nicely. Jot it down your own way, for example "increased the budget on campaign 02, need to swap the creatives", and click Reword with AI. The AI returns a clear, friendly note for the client, without adding facts you didn't write. Don't like it? Click Undo to go back to your text. Rewording uses AI credits.

If you'd rather have AI write a text based on the numbers, use Period Analysis (AI). It's a separate section and can be turned on at the same time.