What is the one common mistake everyone makes in marketing according to Bill Carmody?

The one big mistake Bill Carmody calls out in marketing is making it about you instead of about them.

Most marketers fall in love with their product, message, or brand story and talk from their own point of view. Bill’s core principle is: make it “more about them, less about you” — fall in love with your customers, their problems, desires, and language, and let that drive all your marketing.

Would you like help applying this to your specific offer or niche?