Adding an author box to your WordPress website can increase the visibility of an author's details. Out of the box WordPress has a simple by-line for posts and pages, and adding your social media and other contact information can become tedious without a plugin.
There are many plugins that can accomplish this, be sure to choose one that fills all of your needs. Whenever you're deciding on a plugin be sure to check the developer's page to determine if they're still maintaining the plugin with updates.
One such plugin that is updated consistently is the Simple Author Box plugin.
This particular plugin takes content that already exists for authors and applies it to the author box.