realname support

I don't know what realname is? Can you please provide more information?

He talks about RealName ( https://www.drupal.org/project/realname → ) module support.
We can think of Realname as a name-surname phrase or a new nickname used instead of username.
In most scenarios, it is important to search for the user or author by their real name instead of username, so I think this support is also necessary.

I'm not sure how facets should support this? As long as Search API gives us this as a string we can work with it. So I guess this is supposed to be in the realname project to support Search API