What would be a suitable closing for a professional email?

Using "Best wishes," as a closing for a professional email is suitable because it strikes a balance between professionalism and warmth. This closing conveys a sense of goodwill and respect without being overly formal. It is particularly appropriate for various contexts, such as communicating with colleagues, clients, or stakeholders, where a friendly yet professional tone is essential.

"Cheers," while friendly, may come across as too casual in certain professional contexts. "See ya," and "Later!" are even more informal and often utilized among friends or acquaintances rather than in a business setting. Such closings can undermine the professionalism expected in formal communications. Therefore, "Best wishes," successfully maintains a professional demeanor while also expressing a positive sentiment towards the recipient.