here's my take from years of watching what actually lands in a marketing team environment. if she's the sociable type who builds a lot of cross-team relationships, a filled sweet jar on her desk is a solid move - it literally drives traffic to her and makes her a go‑to for quick chats. that's a low‑cost, high‑visibility play.
otherwise, keep it entirely non‑work. A decent pot plant or a clothing cheque beats another branded notebook or desk trinket. people appreciate something that doesn't scream "marketing swag."