Stardust is a rare and valuable resource in the world of Pokmon GO. It is used to power up and evolve certain Pokmon, and it can also be used to purchase items from the in-game shop. There are a few different ways to get Stardust, and the most common method is to catch Pokmon. Each time you catch a Pokmon, you will earn a certain amount of Stardust, depending on the type of Pokmon and its level.
Another way to get Stardust is to hatch eggs. Eggs can be obtained from PokStops and Gyms, and they can be hatched by walking a certain distance. When an egg hatches, you will receive a Pokmon and a certain amount of Stardust.