The esc_html_e function in WordPress is used to internationalize strings in a safe way for output into HTML content. It’s a combination of esc_html() and _e() functions.

Here’s what it does:

1. esc_html(): This function escapes any HTML that might be in the string. This means it converts special characters to their HTML entities. For example, < becomes <. This is important for preventing Cross-Site Scripting (XSS) attacks.
2. _e(): This function translates the string into the site’s current language, if a translation is available. This is part of WordPress’s internationalization (i18n) system.

So, esc_html_e( $text, $domain ) is equivalent to echo esc_html( __( $text, $domain ) ).

Here’s an example of how you might use it:

esc_html_e( 'Hello, world!', 'my-text-domain' );

In this example, ‘Hello, world!’ is the string to be translated and escaped, and ‘my-text-domain’ is the text domain that helps WordPress find translations for your plugin or theme.