What are directives? Name some of the most commonly used directives in AngularJS application

A directive is something that introduces new syntax. They are like markers on the DOM element, which attaches a special behavior to it. In any AngularJS application, directives are the most important components.

Some of the commonly used directives are:

1) ng-model

2) ng-App

3) ng-bind

4) ng-repeat

5) ng-show