The Superhero Database Classification number, or SHDB Class, is a number that represents the overall 'power' of a character. All traits of a character are used for calculating the Classification.
What it DOESN'T mean
This doesn't mean that a higher class would always beat a lower class character. But the bigger the difference in Class is, the more obvious it is who'll win in a fight.
How is this calculated
( INT^1.3 + (STR*0.5 )^2 + (SPE*0.5)^2 + DUR^1.6 + (POW + (SPS*SPL))^2 + COM^1.8 ) ^ TIER
Super Power Score and Level
Every Super Power has a score (SPS) that is used to calculate the Class. Each Super Power also has 3 levels (SPL). The level is set when connecting that Super Power to a character. The level determines the final score, of the Super Power, being used in the calculation.
Hypertime, a concept fathered by Grant Morrison & Mark Waid, is the immeasurable collection of timelines which each branch off from the most current one. The idea behind it is that serves as a sort-of location which contains ALL realities formed by writers from the past, present, and future of the DC publishing company.
Hypertime is located outside of the Prime Multiverse, though it was created by the World Forger, a resident of said multiverse (JL v4 #30).