The document outlines the main features of an effective poster, including layout, content, and expression. It provides guidance on creating eye-catching titles, slogans, drawings, and proportional spacing in the layout. For content, it emphasizes including relevant details like themes, events, authorities. Finally, it suggests using persuasive phrases and creativity while adhering to word limits. It then provides examples of poster prompts to design for promoting health, communal harmony, and cleanliness.