In designing and developing your website, there are numerous options for the types of content you wish to include in your site. Basic content - in the form of information, news items, blogs etc, can be added to pages within the basic structure of your site. But you may wish to have other features - or other interractive website facilities for your users.
There are numerous extensions or add-ons which can add these capabilities to your website. Examples of these available extensions include the following:
See examples here:
Types of Extensions
There are five types of extensions:
You can read more about the specifics of these using the links in the Article Index - a Table of Contents (yet another useful feature ) - at the top right or by clicking on the Next link below.