a conclusion does two things

• think of the conclusion section as a inverted pyramid in that it contains all of the information that's arguably least relevant to the topic, which might include your personal opinion and/or thoughts and feelings on the matter.

• you can also think of the conclusion as related to the methods/search strategy section. in the methods/search strategy section, the idea is to tabulate all of the information necessary such that another researcher could exactly duplicate your research process to find all of the exact same articles as you did in the exact same way. in this way, you're kind of indirectly communicating with another researcher. the same goes for the conclusion. there, you want to hand over any extra tidbits of information that might someone pick up your trail where you left off. the idea is you want to give another researcher a productive place to begin. that is, you want to specify a few good places to begin and detail why they are in fact good places to begin. you suggest directions for future research.