In WordPress, A website’s appearance and display interface are specified by using a set of templates and stylesheets is a Theme.
From the WordPress admin area under Appearance » Themes we can modify, manage, and add. There are several free and paid WordPress themes available. WordPress.org has an extensive collection of free themes in their Themes Directory.
Each one begins with a different design, layout, and features. A user needs to pick the one that suits their taste and specs for their website. Some theme design to assist specific sites, e.g., Photographers and photography websites will use Photography Themes.