While in the case of the Foobiverse, nothing is learned, we learn a great deal from Red and the Gang at the Lodge owing to Mr Smith being as subtle as a knee to the groin about Red's blindspots and vast ignorances. We learn that there is one thing, one sole contributing factor that surpasses all others in explaining why there is any sort of tension, acrimony, hurt feelings and so on and so forth in Red's marriage. Steve Smith helps his readers identify this factor by putting it on the cover:
Hint: It sincerely believes that an upright vacuum cleaner is THE anniversary present. Simply put, it's a companion to the series in that it's a jeremiad about man-children like Red who do little more than get in their wives' way.