Since Joomla is a Content Management system, the things that you would be using throughout your entire web site would be things that are called “plug-ins”. What these do is to extend or expand the power of your web software by installing modules that are those plug-ins. What are those things like?

You can add a blog to anyone of the areas you have on that site. The information that you present to your readers could be in the form of a poll. A calendar might be an attractive addition to a site that is based on any kind of current events, or when you have upcoming events you need to tell them about.

There are many thousands of templates that are available for your use to make your web page(s) look the way you want them to look. This, in an era of constantly updated interactive web sites, is a very good thing for you to look into! A search for free Joomla templates will bring up many millions of hits for your viewing pleasure.