Pluto is the final generational planet. It spends so long in a sign that it affects everyone born within a thirteen-year period near the time of your birth. All by itself, it is not the most important feature of your chart, since such a huge number of people share this placement.
However, it does describe some general conditions that were activated during that period, and to a certain extent, you and those of your generation carry that energy forward with you as you mature and develop. Pluto is all about power, and the Pluto sign of anyone in power shows how they will wield this important responsibility. Those born with Pluto in Sagittarius (from 1995 to 2008) will not be in power for many years to come, but they can be counted on to transform the areas of religion, faith, philosophy, education, and world travel. The dramatic death and rebirth of certain aspects of these areas will be stressful, but necessary for survival. Pluto goes to extremes.