Joomla Modules can be used to easily add other elements to your web pages.
Depending on what Template you are using will determine how many Joomla Module positions you have to utilize. Some Templates have a lot, while other have few. It varies from one to the next.
Modules are like mini Components. They add limited functionality to your Joomla website. A good example would be a Module that shows your Facebook activity or a newsletter sign up box.
You can place just about anything in a Module position. These Module positions surround the content that is viewed on your website. For example, if you wanted your contact information on every page of your website you create on module for that and have it view able on every page vs placing that information on each page / article on your website.
You have the ability to control where the module is visible on your website and you can get very creative in your layout with the use of Modules.
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