Chances are the fragrance you choose will also have several "notes." Perfumes often contain layers of scents to create their unique bouquet. These layers are referred to as notes, and rather than noticing only one type of scent (rose or vanilla), you'll pick up on several notes that become more apparent over time. So what you smell at the beauty counter will change by the time you get home.
"Perfume is made up of notes. Floral/Fruity | Spicy/Oriental | Woody/Musk Perfume is made up of notes, the top note is the first hit of scent you smell when you spray it, the heart notes follow which makes up the main body of the fragrance, the base notes are finally released which add depth to the perfume."
Top notes: This is what you smell immediately upon applying your perfume. It's the scent that first hits your nose, but then evaporates quickly.
Middle notes: The middle notes emerge as the top notes are dissipating and make up the majority of the scent.
Base notes: These notes are richer and are not often detected until you've been wearing a scent for at least 20 to 30 minutes. These notes provide depth and back up the middle notes to create the overriding theme of the scent.