WordPress Themes are pre-designed templates or layouts that can be installed and activated on a WordPress website to change its appearance and functionality. A theme controls the visual layout and design of a WordPress website, including the fonts, colors, page layouts, and style of elements such as headers, footers, menus, widgets, and more.
Themes can be customized to meet specific website requirements and can be changed or switched out whenever desired. WordPress themes are designed by developers and designers and can be downloaded from the official WordPress repository, third-party marketplaces, or directly from the theme developer's website. Some WordPress themes are free, while others require a purchase or subscription.