Answer
"Hope" emerged as the powerful message conveyed on Barack Obama's iconic 2008 presidential campaign poster, designed by renowned street artist Shepard Fairey. The word, set against a vibrant backdrop, symbolized optimism, change, and the collective aspiration for a better future. The simplicity of the design, featuring Obama's face and the word "Hope," resonated deeply with the public, becoming an enduring symbol of his campaign and eventual victory.