What are Blade components and Twig macros, and how do they help you create reusable pieces of template markup that can be used consistently across many different pages?

Blade components and Twig macros both let you define a reusable, self contained piece of template markup once, such as a styled button, a form input field, or an alert message box, optionally accepting parameters to customize its appearance or content each time it is used, and then reuse that same defined piece of markup consistently across many different pages throughout an application, which avoids duplicating the same markup repeatedly and makes updating that shared component's appearance in the future a matter of changing just one central definition.

{{-- Blade component usage --}}
<x-alert type="success" :message="$message" />

{# Twig macro definition #}
{% macro alert(type, message) %}
    <div class="alert alert-{{ type }}">{{ message }}</div>
{% endmacro %}