Username
You should change the default username WordPress gives you for security reasons. Admin is the default username which WordPress gives you.
![WordPress installation admin username](https://steadywp.com/wp-content/uploads/2019/01/wordpress-installation-admin-username.png)
Database prefix
The default database table prefix WordPress gives you is wp_, change this to something different to fend off most security threats aimed at the database. It could be a random string of text or the name of your site for instance.
![WordPress installation table prefix](https://steadywp.com/wp-content/uploads/2019/01/wordpress-installation-table-prefix.png)