Business is about people. As businesses are run by people, supplied by people and kept afloat by people, surely it makes sense to engage with those people.
Corporate communications, adverts, articles or websites, are opportunities to connect, oportunities to sharpen your brand (or corporate personality) and shape your customer experience.
Focusing on customer experience you educate potential customers, suppliers and staff about your products and services and show them that you value their support.
Clear language allows you to remove confusion and ensure that you and your company focus on what is important to your business.
Organizations unwilling or unable to focus upon clarity and customer experience can not hope to fully engage with their staff, customers or suppliers.
However, being clear and customer-centric is not enough. You have to be interesting as well. Even if your product or service is the cheapest, fastest, or best in its class, if you have bored your customer you've lost their interest and with it, your potential to sell.