Pages are main part of the WordPress and this makes the WordPress a solid CMS tool. You can manage all pages from Admin > Pages section. If you are absolutely new to Wordpress, please check the Getting Started with WordPress.
Note: Once the page is created, it should be added to menu via Appearance >> Menus if you'd like it to appear in the navigation on website frontend. There are two menu positions Navigation Menu and Footer Menu. The rest of this section is devoted to page templates available within the theme and the custom options provided.
A number of custom options is available for any page created. Once you are in a specific page in admin panel, scroll down until you see the custom options block illustrated in below Screenshots. We will go through options one by one:
Note: You should read about the Sidebars / Widgets section to understand more usage of this box.
Olinia theme documentation: version 1.0