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. This means that every source of XP is doubled with a Lucky Egg, including catching a Pokemon, evolving a Pokemon, hatching a Pokemon, and visiting a Pokestop. Lucky Eggs can be purchased in the Shop in exchange for PokeCoins, or they can be earned by achieving certain experience levels.

It is recommended to use a Lucky Egg when you are about to improve your Friendship Level with a friend, especially when reaching Ultra Friends or Best Friends, to maximize the XP you can earn. You can also save completed Special Research tasks and wait to clear them until you’ve used a Lucky Egg. To make the most of a Lucky Egg, it is suggested to plan to evolve lots of Pokemon and explore new areas saturated with Pokestops before activating the Lucky Egg. Additionally, Lucky Eggs can be stacked by activating up to 200 at a time to increase their effects instead of using one every 30 minutes.