In Redux Toolkit, a slice is a collection of Redux reducer logic and actions for a single feature of your application. It combines the state, action creators, and reducers for that feature into a single, easy-to-manage unit.
name: A string name for the slice that is used as a prefix for the generated action types (e.g., counter/increment).
initialState: The starting value for that specific piece of the Redux state.
reducers: An object where the keys are the names of the actions (like increment or decrement) and the values are functions that define how the state should change.
Defines a portion of the Redux state (e.g., user, counter, todos).
Automatically generates action creators and action types based on reducers.
Simplifies reducer logic by allowing direct state mutation using Immer.
Keeps related logic (actions + reducers) together for better organization.