The document summarizes the analysis of four campaign posters. For the first poster promoting Obama for president, the message is to inform people where to vote for him and persuade them to vote for Obama. The second poster raises awareness about the dangers of using a phone while driving. The third poster from decades ago recruited men to join the army by making the call personal. The fourth poster aimed to decrease knife crime by using the strong message "Carry a knife and lose your life" showing the consequences of prison.