A WordPress theme is a bundle of modifiable template files that, once installed, helps to establish consistent design throughout a WordPress site without altering its core features. It typically doesn’t affect your content, rather altering the way it is displayed for site visitors.
WordPress themes cater to all sorts of user preferences and needs. Each comes with customizable designs, with the option to modify its code, insert widgets, or add plugins.
There are WordPress themes for every kind of site – from eCommerce websites to food blogs. Generic themes are also available if you prefer them over niche-specific choices.
Find themes on the official WordPress theme directory or third-party theme marketplaces such as Themeforest and themeisle.