Your site has some commonly used modules already preconfigured. These include:
Each of these modules has many options which you can experiment with in the Module Manager in your site Administrator. Moving your mouse over a module and clicking on the edit icon will take you to an edit screen for that module. Always be sure to save and close any module you edit.
Joomla! also includes many other modules you can incorporate in your site. As you develop your site you may want to add more module that you can find at the Joomla Extensions Directory.