How can Composer be utilized to simplify the installation process of PHP libraries like PHPMailer?

To simplify the installation process of PHP libraries like PHPMailer, Composer can be utilized. Composer is a dependency management tool for PHP that allows you to easily manage and install libraries for your projects. By creating a `composer.json` file in your project directory and specifying the required PHPMailer library as a dependency, Composer will handle the installation process for you.

```php
// composer.json
{
    "require": {
        "phpmailer/phpmailer": "^6.5"
    }
}
```

After creating the `composer.json` file with the specified PHPMailer dependency, run `composer install` in the terminal to download and install the PHPMailer library into your project. This simplifies the installation process and ensures that the required library is readily available for use in your PHP project.