From a Reuters article:

The Chandrayaan-3 is aimed at the lunar south pole, a region with water ice, or frozen water, that could be a source of oxygen, fuel and water for future moon missions or a more permanent moon colony.

If it lands successfully, the Chandrayaan-3 is expected to remain functional for two weeks, running a series of experiments including a spectrometer analysis of the mineral composition of the lunar surface.

Edit: This is going to be the site of US' Artemis-III mission as well. So NASA would be very keen to know about the findings out of this rover and lander.