Extract the zipped package downloaded from ThemeForest to your desktop. In the extracted package you will find the trawell.zip file which is the installable WordPress theme.
You can install the theme in two different ways:
1. WordPress theme uploader
Navigate to Appearance -> Themes page to access the theme uploader screen and use the trawell.zip file.
Watch the entire process in this short video:
Extract the trawell.zip file and upload the extracted trawell folder to /wp-content/themes/ folder on your server. You will have to use FTP software, like FileZilla.
After uploading the theme, you have to activate it. Navigate to Appearance -> Themes page to activate the theme.