Writing is Universally Important. Almost every industry has some key component that is done through the written word. Consider the following common writing contexts:
• Email
• Report to customers
• Report to managers
• Texting
• Resume
• Proposal
• Status Update
• Executive Summary

Key ideas with good writing are to be succinct, consider the context, use organization patterns, and consider your audience when crafting a written message. Oh yeah, and don't forget that writing--even texting and email--have legal implications. So be cognizant about what you put down in writing.