Reac - Redux

Immutable state tree
Dispatch actions

Pure fuctions don't modify the attributes that the recieve and also alway return the same value for the same params

Reducer: takes the previus state, the action to be dispatch and returns the next state.
Reducers change(But don't mutate it) properties in the store
action has a type 
use payload as a convention for naming actions' values


Store: Manage states of the app. It also dispatch actions.