It is unclear what that function even is, when there is no context.
Suggested Fix
I checked the code, the docbloc is there, technically this should be automatically generated by the parser... if that for some reason is not working, below attache the information to add
I believe there usually also is source code section
/**
* Displays or retrieves page title for all areas of blog.
*
* By default, the page title will display the separator before the page title,
* so that the blog title will be before the page title. This is not good for
* title display, since the blog title shows up on most tabs and not what is
* important, which is the page that the user is looking at.
*
* There are also SEO benefits to having the blog title after or to the 'right'
* of the page title. However, it is mostly common sense to have the blog title
* to the right with most browsers supporting tabs. You can achieve this by
* using the seplocation parameter and setting the value to 'right'. This change
* was introduced around 2.5.0, in case backward compatibility of themes is
* important.
*
* @since 1.0.0
*
* @global WP_Locale $wp_locale WordPress date and time locale object.
*
* @param string $sep Optional. How to separate the various items within the page title.
* Default '»'.
* @param bool $display Optional. Whether to display or retrieve title. Default true.
* @param string $seplocation Optional. Location of the separator (either 'left' or 'right').
* @return string|void String when `$display` is false, nothing otherwise.
*/
There also should be a bold notice stating that this function is not suggested anymore and instead, add_theme_support should be used.
Issue Description
This documentation appears broken. There should be at least some $args description, source code...
URL of the Page with the Issue
https://developer.wordpress.org/reference/functions/wp_title/
Why is this a problem?
It is unclear what that function even is, when there is no context.
Suggested Fix
There also should be a bold notice stating that this function is not suggested anymore and instead, add_theme_support should be used.