WordPress.org is a self-hosted platform that will need to be set up using a WordPress website host (or server). WordPress.org is also where you’ll find a plethora of free software & plugins that you can download and install on your own web server.

WordPress.com manages your hosting and you don’t have to download plugins, pay a fee for website hosting, or manage a web server.

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A WordPress theme, not to be confused with a WordPress template, is a collection of templates and stylesheets (made up of CSS coding) used to define the appearance & functionality and overall display of a WordPress powered website. Both WordPress.org and WordPress.com websites use a theme to display information, imagery, and graphics.

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A WordPress plugin is a piece of software built with a group of functions that can be added to a WordPress website. Think of WordPress plugins as apps for your iPhone — they have the ability to extend functionality or add new features to your WordPress website. WordPress plugins are typically written in PHP language and seamlessly integrate with a WordPress website.

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