Controller:
return redirect()->route('subscriptions.index')->withSuccess(['Success Message here!']);
Blade
@if (session()->has('success'))
<div class="alert alert-success">
@if(is_array(session('success')))
<ul>
@foreach (session('success') as $message)
<li>{{ $message }}</li>
@endforeach
</ul>
@else
{{ session('success') }}
@endif
</div>
@endif
You can always save this part as separate blade file and include it easily. fore example:
<div class="row">
<div class="col-md-6">
@include('admin.system.success')
<div class="box box-widget">