What is Great Ball in-game?
Mid-tier Poké Ball. 1.5× catch rate vs the standard Poké Ball.
Mid-tier Poké Ball. 1.5× catch rate vs the standard Poké Ball.
Great Balls multiply catch rate by 1.5×. Unlocked at Trainer Level 12. Become the default for any catch above L15 wild encounters.
Source: PokéStop spins (more common at higher Trainer Levels), research tasks, special research rewards.
For raid catches the only ball available is the Premier Ball, so Great/Ultra Balls don't apply there.
What does Great Ball mean in-game?
Mid-tier Poké Ball. 1.5× catch rate vs the standard Poké Ball.
Great Ball explained in detail
Great Balls multiply catch rate by 1.5×. Unlocked at Trainer Level 12. Become the default for any catch above L15 wild encounters. Source: PokéStop spins (more common at higher Trainer Levels), research tasks, special research rewards. For raid catches the only ball available is the Premier Ball, so Great/Ultra Balls don't apply there.
What are other names for Great Ball?
Great Ball is also called: great balls. All refer to the same concept in-game.