In Bootstrap 5, containers are used to wrap and center the content within a fixed or responsive width. Containers provide a consistent layout and help maintain proper alignment across different devices and screen sizes. Bootstrap 5 offers two types of containers: `.container` and `.container-fluid`.

1. **`.container`**: The `.container` class creates a fixed-width container that adapts its width based on the user's device or screen size. It provides a responsive layout with a maximum width determined by breakpoints. To use `.container`, wrap your content within a `<div>` element with the `.container` class, like this:

html
<div class="container">
    <!-- Content goes here -->
</div>…

2. **`.container-fluid`**: The `.container-fluid` class creates a full-width container that spans the entire width of the viewport. It adjusts its width according to the available screen space without any maximum width restrictions. To use `.container-fluid`, wrap your content within a `<div>` element with the `.container-fluid` class, like this:

html
<div class="container-fluid">
    <!-- Content goes here -->
</div>

Here's an example that demonstrates the usage of both containers:

html
<div class="container">
    <h1>Fixed-Width Container</h1>
    <p>This container has a fixed width and adjusts its layout based on breakpoints.</p>
</div>

<div class="container-fluid">
    <h1>Full-Width Container</h1>
    <p>This container spans the full width of the viewport without any maximum width restrictions.</p>
</div>

By default, containers in Bootstrap have padding to provide spacing between the content and the container edges. If you want to remove the padding, you can add the `.p-0` class to the container, like this:

html
<div class="container p-0">
    <!-- Content goes here -->
</div>

Remember to customize the content within the containers using Bootstrap's grid system, rows, and columns to create responsive layouts and organize your content effectively.

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