The final paragraph is your conclusion. Your concluding paragraph is similar to the introduction in many ways. You need to restate your topic and why it is important. What makes it different is the call to action. With the call to action you tell the reader the "so what." You need to conclude with what the reader should do with the new information they have gained through reading your paper.
Do not bring up any new points in the conclusion. The conclusion should only be a restatement of what you have already written in your paper.