How To Level Up Fast In Pokémon GO

Lifehacker reports Pokémon Let’s Go for the Nintendo Switch will interact with Pokémon GO,
so players are returning to the mobile game en masse to level up quickly. But whats the best way?
Spin at a gym, like you would at a PokéStop, for a Free Raid Pass, which can be used on any level raid.
Save that Raid Pass for the next day you have time to play for at least half an hour or so.
When you’re ready, pop a Lucky Egg to get double XP for 30 minutes and join your first raid.