laravel doesn't display massage while redirecting back

in my controller i have

//some actions
return redirect()->back()->with("msg", "ტური შენახულია");

in my blade template i have

    @if(isset($msg))
        <div class="alert alert-success"><strong>{{$msg}}</strong></div>
    @endif

but it doesnt display the massage. i also try this

return redirect()->back()->with(["msg", "ტური შენახულია"]);



$msg = "ტური შენახულია";
return redirect()->back()->with(compact("msg"));

but it doesnt display anyway

via Chebli Mohamed