Walk down a suburban street, and you might stumble across a following sign. It’s probably messy with poor formatting and inconsistent font size. Here’s one that I saw in Houston.

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One line stuck out to me. It reads, “Window cleaning in progress.” I love this board because it showcases something that most marketers forget. K&C Window Cleaning doesn’t try to persuade you with flashing slogans or in-your-face claims. They’re far more subtle, and that subtly makes them more effective.