This is what I like about this photo: it tells me something about the story of the day through a beautiful spontaneous moment.
I really like the composition with all these arms that go around the bride and the bride who also hugs everybody. Everyone in this picture seems to live this hug experience really differently. I like the different looks on the people's faces: this is what sets this picture apart from the photographs we usually see. And the use of black & white is a good choice because it keeps me looking at what's happening in the center of the composition where the action takes place.