These are used in private lobbies or offline with bots to test grenades, wallbangs, or practice movement. You can create a file named practice.cfg in your game directory.
Modern CS:GO (and its successor CS2) uses a specific local folder for user-specific configurations to keep them synchronized via Steam Cloud: CS2 - How to create a PRACTICE config CS:GO Cheat Configs
: Maximum intensity settings (Spinbot, High FOV) used on servers without effective anti-cheat protection. These are used in private lobbies or offline
: Settings designed to look like a high-level human player. These typically feature low Field of View (FOV) and "humanized" smoothing for aim assistance. CS:GO Cheat Configs
For users of third-party software, "configs" are often shared JSON or INI files that dictate the intensity and behavior of various features.