Every theme comes with Theme Options found under the Appearance menu. It’s sometimes named slightly differently, sometimes incorporating the name of the theme or the themes designer.
Clicking on Theme Options gives you access to a whole lot of new features and options that you can set to customize your website. This can include page layouts, including or excluding sidebars, navigation menu styles, home page widgets, text areas, image sliders, social media links, etc. All theme options are self-explanatory and even have simple help tips when a feature or ‘?’ symbol is hovered over.