#1 To boost the ratings
RAW has been having a few dismal weeks because of the shows they've been putting up. This week felt like a fresh start when Rollins accused Corbin of being the reason the shows did not deliver. He broke the fourth wall and mentioned the TV ratings. It was clear that WWE had put time and effort into this show and they would put on a really good episode.
A match of this magnitude on RAW is a must watch affair for sure. Such a match gets discussed, talked about and gets viewers to tune in. Fans also had a feel-good moment when they saw Corbin lose, at long last.
This match also established Seth Rollins as the new king of the division. In the absence of Reigns, he had stepped up to the plate to become the company's top babyface.
Let's hope he becomes Universal Champion someday.