Как в Laravel сделать простое уведомление?
Flash сообщения поищите. Это стандартный функционал.
Решение спасибо Sanes Sanes  : файл flash-message.blade.php@if ($message = Session::get('success'))
<div class="alert alert-success alert-block">
	<button type="button" class="close" data-dismiss="alert">×</button>	
        <strong>{{ $message }}</strong>
</div>
@endif


@if ($message = Session::get('error'))
<div class="alert alert-danger alert-block">
	<button type="button" class="close" data-dismiss="alert">×</button>	
        <strong>{{ $message }}</strong>
</div>
@endif


@if ($message = Session::get('warning'))
<div class="alert alert-warning alert-block">
	<button type="button" class="close" data-dismiss="alert">×</button>	
	<strong>{{ $message }}</strong>
</div>
@endif


@if ($message = Session::get('info'))
<div class="alert alert-info alert-block">
	<button type="button" class="close" data-dismiss="alert">×</button>	
	<strong>{{ $message }}</strong>
</div>
@endif


@if ($errors->any())
<div class="alert alert-danger">
	<button type="button" class="close" data-dismiss="alert">×</button>	
	Please check the form below for errors
</div>
@endif
Вставить в шаблон @include('flash-message')
Вернуть из контроллера return back()->with('success','Item created successfully!');