The note, in its broadest sense, encompasses an astonishing spectrum of olfactory experiences, as it refers to a vast class of organic compounds rather than a singular scent. Generally, it manifests as bright, vibrant, and often very fresh, providing an immediate olfactive lift. Specific examples range from the sharp, sparkling, zesty burst of citrus (limonene), the green, resinous, camphoraceous bite of pine forests (pinene), the herbaceous, slightly metallic coolness of lavender (linalool), to the more rosy, waxy nuances of geraniol. The initial impression is typically effervescent and highly volatile, radiating quickly and contributing significantly to a fragrance's initial projection. While many terpenes are top-to-heart notes, giving a clean, airy, or sometimes woody backbone, their intensity and longevity vary immensely. Their texture can feel airy, juicy, clean, or even somewhat raw and earthy, depending on their specific molecular structure and natural source. They are rarely 'heavy' or 'dusty' but rather bring clarity and brightness.