Following are the essentials of a good business letter:
1. The language of a business letter should be clear and easily understandable.
2. The language should be simple and easy.
3. The letter should be concise and to the point.
4. The letter should be free from grammatical errors.
5. The flow of the letter must be consistent.
6. The letter should not contain any irrelevant information.
7. The size, quality, colour, folding and envelope of the letter should also be proper.