MySQL Databases allow you to store lots of information in an easy to access manner. The databases themselves are not easily read by humans. To use a database, you’ll need to create it. Only MySQL Users that have privileges to access a database can read from or write to that database.
You should follow the instructions from your hosting provider on how to create a database, because it can vary. After you created the database and have setuped a user granded with previleges, you can start to import the .sql script that is included in the PHP folder. Most hosting provider have a tool called phpMyAdmin. This tool allows you to easily import tables to your database. In the top menu there is a button “Import”, clicking on it will give you all information that are required to import the sql script.
The next step is to upload the php scripts and the crossdomain.xml file. Please note that the crossdomain.xml file needs to be in the root folder. Before you can run your game, you should fill out the config.php file with the created database information and setup the paths in the editor.