How can you develop your business communication skills and build rapport with colleagues and customers?

I believe in order to develop business communication skills is first to know where you are, or know what you have, your level of expertise. Then, you have to know whom you're addressing your message to (writing or speaking). Then, according to the former points, communicate your message, taking care of the different needs of each side. Depending on the level your peer/customer, you tailor your communication. 

Developing business skills and building strong relationships with the client are required with creativity, innovation and design at work