This is a fragrance oil, not an essential oil. This means it is premixed with a carrier oil so you can apply it directly to your skin as a perfume. You can use it in a diffuser, just be sure to clean out your diffuser once in a while to avoid build-up of residue.
This is a common oil to find in perfumes and air fresheners with its classic musky sweet scent. This oil has been used for centuries to help with colds and muscle therapies.