Installing components, modules or mambots on Joomla is not a hard task. Most of Joomla extensions come along with installation instructions. However, it is always adviseable to backup your current installation prior importing additional functionality. For more information on how to do that, please refer to our Joomla backup tutorial
Once the backup is complete you can proceed with the desired installation.
First, you need to download the desired component, module or mambot to your local computer. Generally they come as archives with the appropriate prefix according to their functionality: com_ - for component, mod_ - for module and mos or bot added in the file name for a mambot.
Once you have downloaded the file, please login to your Joomla administrator backend and click on the Installers menu from the main menu.
Now, please select the appropriate choice for the installation (component, module or mambot) and click the [Browse...] button, find the extension file you have downloaded and click [Upload File and Install]. If all is fine, you will be redirected to a screen stating Upload component - Success.
That is it. You can now use the newly installed addon. You will be able to see it in the corresponding menu in your admin backend - Components, Modules or Mambots.
Please, bear in mind that some addons might require additional configuration. In such case, this will be explicitly stated in the instructions added to the installation package.
Well done! You can now successfully install extensions to your Joomla!