Inside Parental Advisory you will find 5 construction kits. Construction kits are helpful when you need an element in your track that is missing. Use the bass loops to draw inspiration for your track, alter to your liking, use them as one-shots, and even use them as ear candy.  
Utilize the construction kit as placeholders for parts of your drop to use as a reference. 
Construction kits have been mixed and mastered for you so you can focus on what's important, the idea of your track.