I think communication is the basis of the social relationships between each being (human, animal or even vegetal). If we didn't communicate, the humanity would probably collapse. Because communication is the only way to solve a problem, to introduce yourself, to tell somebody that you love her/him, ...
Besides this essential aspect, skills in communication are all the more important to make it effective. By effective, I'm implying when the communication process is perfectly adjusted, making every single message clear, concise, coherent... The 7Cs. But especially convincing !
When I was young, I used to do some acting at middle school. I didn't really like learning whole pages of lines, but I enjoyed acting on the stage because I could give free rein to my imagination and to my abilities to make people laugh. I think that acting is a really good means to learn a lot about effective communication skills. Because when you want to make people laugh, you actually try to be clear and concise in the way you'll tell the joke. You also try to use the appropriate gesture, or face expression, at the right moment, and which will make the audience laugh.
Effective communication skills allow people to convey their message with style, courtesy, strength of conviction and charisma. Those are the best ingredients so that your interlocutors are suspended from your lips and definitely agree with your words. Real communication skills allow you to convey convincing messages, and you can be respected for that.
Later, I will be a supply chain manager. To my view, a manager has effective communication skills if he is highly persuasive and comprehensible by his colleagues. And that's maybe the most important aspect for me, as a future manager : the ability to convince people with those skills.