Hi Jerry,
Not an expert but have made the following observations over the years. The data shows that the page you got this picture from was generated VERY fast at 0.0644444 seconds. (Anything under a half second is just an eye blink away.) That's because it got most of the needed info for the page came from your cache. The numbers at the bottom show an aggregate of 788 items from cache, 64 had to be retrieved from the db and 3 caused new items to be added to the cache.
Each of the boxes above the Total: 788/64/3, show the individual breakdowns of those totals. If you watch them, you will see that they are color coded red, yellow and green, on two lines. The upper line was the "last time" results and the lower is the "current results" from the latest page load. Red indicates nothing retrieved from cache. Green indicates most, if not all, was retrieved from cache. Yellow indicates some came from cache, but more was missed and may have needed to be set.
The plain text above the boxes are usually self explanatory except for the Load average. That relates to how heavily "loaded" your CPU is. At 0.05 your CPU is very lightly loaded at the moment.