What is angularjs
Angularjs is a structural framework for dynamic web apps. It's use html as template Language.
Angular Local storage
It's act like us session, so you can simply manage your sessions and temporary data via local storage. You can get the local storage module and more information from below link
ngStorage is the module name of local storage and the controller is $localStorage.
You can simply store the data like $localStorage.currentUser = "Prohcj"