Here's why:
* Impersonal: It distances the writer from the reader, creating a more business-like tone.
* Passive: "Advise" is a verb in the passive voice, which can make the sentence sound clunky.
Alternatives:
* Direct requests: "Please let me know." "Could you tell me?" "Can you advise me on...?"
* More specific: "Please provide your feedback." "Please share your thoughts." "I would appreciate your input."
Example:
* Formal: "When will the shipment arrive? Please advise."
* More informal: "When will the shipment arrive? Please let me know."
In short, while "please advise" is grammatically correct, it's not the most natural or modern way to phrase a request. Choose a more direct and personal alternative for clearer communication.