1. Upload the template's .zip archive
To install the template, you need to upload the template's .zip archive you will find in the download package. Go to your Joomla! administrator area and access EXTENSIONS/MANAGE/INSTALL:
Browse for the template's .zip archive and then press the UPLOAD & INSTALL button to install the template.
2. See the successful installation message
Once the template is successfully installed, you will see an installation confirmation message. For example, the installation confirmation message for the Favourite template looks like this:
3. Set the new installed template as your default template
Assign the new template as the default template for your website by accessing EXTENSIONS/TEMPLATES.
For example, setting Favourite as your default template looks like this: