This is the controversial user. On the competitive ladder (1v1 or team games), some players use trainers strictly for the "Map Hack" feature. By removing the Fog of War, they gain an unfair tactical advantage, knowing exactly when to retreat, expand, or counter-attack.
Did you know StarCraft: Remastered actually includes built-in cheat codes for single-player and offline play? These are safe because they are developer-approved. You simply press Enter and type: Starcraft Remastered Trainer
Warning: These disable achievements for the current mission and will get you banned instantly if you try them in a multiplayer lobby. But for single-player, they are vastly superior to a trainer. This is the controversial user
The creation of a trainer involves three distinct phases: Discovery, Analysis, and Injection. Warning: These disable achievements for the current mission