What did the past mean?

For anyone, the past implies the existence of a track, a label and a certainty. It was precisely because of the past that they were able to converge into the present in order to continue their future.

But if your past is just a pile of data, bits and pieces of genetic information, then what's the point of that past? It was just like the current Zero, who was at a loss when he found out that he was actually a clone created by the genes of a ...