v-model directive is used to create Two-Way Bindings in Vue js.In Two-Way Bindings data or model is bind with DOM and Dom is binded back to model.
In below example you can see how Two-Way Bindings is implemented.
<div id="app">
{{message}}
<input v-model="message">
</div>
<script type="text/javascript">
var message = 'Vue.js is rad';
new Vue({ el: '#app', data: { message } });
</script>
