First of all, once you open the interface you'll see the application's main features, like the antivirus to scan the entire system or parts of it and delete any malware that might be causing problems.
You can also see the care tab, which helps you improve system performance overall by cleaning the registry and trash files, improving Internet speed, defragging the hard drive, optimizing the system, and repairing shortcuts, among many other options.
Inside the toolbox you'll find a summary of all the programs you've downloaded to do specific tasks, but that now just take up space on your computer. All the tools are focused on cleaning, optimizing, repairing, and improving security and control. The last feature is the Turbo Boost, which helps speed up the system, making your computer run like it did on its first day of use.