what does a lucky egg do in pokemon go

A Lucky Egg is an item in Pokemon Go that doubles the amount of XP you earn for a limited period of time, typically 30 minutes. You can purchase Lucky Eggs in the Shop in exchange for PokeCoins, or earn them as rewards for achieving certain experience levels. When activated, a Lucky Egg doubles all XP earned for 30 minutes, including XP earned from catching Pokemon, evolving Pokemon, hatching Pokemon, and visiting PokeStops. You can also stack the effects of up to 200 Lucky Eggs at a time instead of using one every 30 minutes. A pro tip is to consider using a Lucky Egg when youre about to improve your Friendship Level with a friend, especially when reaching Ultra Friends or Best Friends, to maximize the XP you can earn. Additionally, you can save completed Special Research tasks and wait to clear them until youve used a Lucky Egg.