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   namespace App\Providers;

   use Illuminate\Support\ServiceProvider;
   use Illuminate\Support\Facades\View;

   class AppServiceProvider extends ServiceProvider
   {
       public function boot()
       {
           // Example global data
           $globalData = [
               'app_theme' => 'dark', // Current app theme
               'api_limit' => 100,    // API request limit
           ];

           // Share data with all views
           View::share('globalData', $globalData);
       }
   }

Use the shared data in any Blade template: