WordPress users may install and switch between themes. Themes allow users to change the look and functionality of a WordPress website and they can be installed without altering the content or health of the site. Every WordPress website requires at least one theme to be present and every theme should be designed using WordPress standards with structured PHP, valid HTML and Cascading Style Sheets (CSS).
WordPress Themes are files that work together to create the design and functionality of a WordPress site. Each Theme may be different, offering many choices for site owners to instantly change their website look.
You may wish to develop WordPress Themes for your own use, for a client project or to submit to the WordPress Theme Directory.
When installing a WordPress theme, it's important to pay attention to the features that it offers. Modern themes often include much more than just presentation. That is, they introduce functionality.
There are a lot of places on the web to download WordPress themes; however, it's not always safe to download a theme from just anywhere. It's important to vet the reputation of the provider of the theme.