Lifespan refers to the earliest age (in months) that Pug dogs can die on Showdog.com
The "General" factor takes into account such things as show shine and temperament in addition to the other genetic traits.
A specialty show may be regional or national. A "Best in Show" win at a national specialty show is tremendously prestigious, indicating that the winning dog or bitch triumphed at a contest which attracted entries from the most serious fanciers of that breed in the country or continent. Some specialty shows attract international entries.