Can someone explain: Techiat Ha-Meitim (Resurrection of the Dead): A fundamental Jewish belief is in techiat ha-meitim, the resurrection of the dead.

“In the future, during the divinely-perfect “World to Come,” souls will reunite with revitalized bodies. This fusion allows the soul to experience the fruits of their joint efforts during their earthly existence.”

How does this happen? What if you were cremated? Why does God want this ?