The crown is used to communicate source material and to channel information from various sources.
The third eye is used in a lot of your ESP work, it allows for clairvoyance and clairaudiance as well as spiritual connectedness.
The throat is used for communication of all types, both meek and powerful.
The heart is used to love wholely.
The solar plexus is used to channel energy, vitality, heat for many many processes.
The sacral chakra is used to channel energy, sexuality, creativity, coolness also used for many many processes.
The root chakra is used for every process in that it is your legs or your root and without it you wouldn't bear the weight of anything. It makes everything work better, the better it is.
From a basic point of view, and on the positive side.