This is the major module for theme view. You can do a lot of changes such as:
Image type (rectangular or square), logo text or image and the position, nice text fonts and colors, beautiful background patterns and etc.
Front page Theme Settings panel
Back-office Theme Settings panel
Configuration path: Back-office > Modules > Theme Settings, configure
The module has to be always enabled in the Back-office > Modules. It responses for lots of settings for our theme.