Communication is absolutely vital, not just in the workplace but in life. Every interaction with someone involves some form of communication, even if nothing is verbally spoken. You need to be able to communicate to adequately express your ideas and plans on how to execute them.
Keys to Communication
First and foremost, the key to effective communication is to be clear and concise. The goal of communication is to make sure that your ideas are correctly understood. The best way to achieve that is to express them with as little room for confusion as possible. It is easier to engage with your audience when you do not waste their time and give them little opportunity to get distracted.