Templates give your Joomla!® website its look and feel.
Your website template determines:
And other spects of design that makes your website unique.
Your installation of Joomla!® comes prepackaged with two frontend templates - this is what your site visitor(s) see, plus two backend (Administrator area) templates - the Administrator area is where you go to administer your website.
So Joomla!® comes ready to use.
However, there are many, many Joomla!® template developers and businesses - most offering two levels of template accessibility: Free templates, and for-a-fee templates. Most of those template developer websites also have a "Demo" version of each template so you can get something of an idea of what it looks like.
Before using a free, or paid for template check for things such as:
- Compatibility with Joomla!® version;
- Compatibility with your server PHP version;