Can you explain the rules for the "run of 3 pairs" phase in Phase 10?

In the "run of 3 pairs" phase in Phase 10, players need to collect three sets of pairs (two cards of the same number or face value) in order to complete the phase. Each pair must be a different number or face value from the others. The goal is to be the first player to successfully complete this phase and move on to the next one.