They usually come before verbs
Hello. You have not shown the advertisement to which this question refers, which makes it impossible to create an answer with accuracy.
Nazi propaganda was created to convince people to support the Nazi regime, to help the Nazi government achieve its goals and to publicize Nazi concepts regarding race and sovereignty. These advertisements were very effective during the Holocaust, when the Nazis were able to convince people about the problem of allowing Jews to live freely and how they should be exterminated.
Robert Menzies was in office twice, from 1939 to 1941 and from 1949 to 1966. Despite seven successive federal election victories, Menzies’ second period as Prime Minister was not secure. In the 1954 and 1961 federal elections, the Labor Party received a greater proportion of first preference votes for House of Representatives seats (50.03 per cent in 1954) than the Liberal and Country parties combined. Menzies was fortunate to come to office in a growing postwar economy. He also benefited from the Labor split in 1955, and skilfully exploited ‘Cold War’ fears and the threat of Communism for electoral gain.
The conclusion must restate the thesis -- which was stated in the introductory paragraph. Think of the introduction and the conclusion as the two slices of bread of a sandwich.