Well, it could be important for various reasons. It might be the point where a major plot twist occurs. For instance, if the story has been leading up to a mystery about a character's past, page 76 could be where some key information is revealed. Or it could be where the main character makes a life - changing decision. Maybe it's also important for the visual aspect. There could be a particularly striking illustration on this page that has a deeper meaning related to the overall theme of the story. It could also be a page that ties together different storylines that have been running parallel throughout the novel.