Trainer experience

During the game, Trainers gain Experience Points (XP or EXP for short) which results in their Levels. Trainer's experience is basically measurement of their progress of gameplay.

Experience Points
A Trainer's advancement is measured in Experience Points. As a Trainer gains more XP, they will advance to higher level. XP can be gained through various in-game actions, such as: catching Pokémon, hatching Pokémon Eggs, interacting with PokéStops and battling in Gyms and Raids.

List of Experience Points sources
There are several ways of obtaining Experience Points. If Trainer is under the effect of a Lucky Egg when performing any of actions that rewards them with Experience Points, the XP gained will be doubled.

Trainer levels
Trainer's Experience Points are measured by Levels. The higher certain Experience Points values Trainers have, the higher level they advance to.

A Trainer can level up to access newer items and more powerful Pokémon. The current maximum level a player can get is 40. Each time players level up, rewards are given to them based on what level has been achieved.

Trainer Level is related to level of owned Pokémon. Obtained Pokémon won't have its level higher than trainer's level. Max level Pokémon is able to power up once trainer achieve the next level, unless Pokémon achieved the general maximum level which also is 40.

List of levels
Each level requires a certain amount of XP and achieving it rewards Trainer with certain items.

XP-related events
Following events featured boosted multiplied trainer XP gain from specific in-game actions. This list does not include bonuses in Mystery Bonus Hour.

Trainer Level Badges from Sprint Store
Below there are graphics of Pokemon GO Trainer Level Badges Available Exclusively at Sprint Stores in physical version of each.

Trivia

 * Unlike in the main series games, Trainer level is more important than a Pokémon's level in Pokémon GO.
 * In fact, Pokémon levels are replaced with CP values that partially informs player about their Pokémon's level.
 * As there is a relation between Trainer level and Pokémon level, there are also maximum CP cap for Pokémon:
 * Pokémon caught in wild – level 30 (35 if weather boosted) (e.g.: Trainer at level 36 won't encounter Pokémon in the wild with level higher than the Pokémon at level 35);
 * Pokémon hatched from Eggs and encountered in Bonus challenge of Raid Battle – level 20 (e.g.: Trainer at level 27 won't hatch Pokémon with level higher than the Pokémon at level 20);
 * Pokémon rewarded from Research tasks – level 15 (e.g.: Trainer at level 23 won't be rewarded with Pokémon with level higher than the Pokémon at level 15).