First: Please use proper punctuation.
Business writing no matter the form should be concise because it allows for more efficient and effective communication. If you have a lot to say, but your writing is long-winded and rambling, your message can become lost in the weeds.
Business writing should use precise language because it helps your reader understand exactly what you mean. This is especially important when you're using technical terms or jargon that might not be familiar to everyone reading the document.
In conclusion, business writing should be concise and precise so that the reader will be able to easily understand what you're trying to say.