Because article or summary is the author of all of the information summarized above. Moreover, if we read the summary before coming back to read the first page again, it makes us more understanding can be read.
The epilogue or a summary of the authors summarize all of the above as well, if we read the synopsis before. Then come back home again, we can be more understanding.
Because the epilogue or summary is the author summarize all information mentioned. And if we read the conclusion. Then read back home again, it makes we can read to understand more.