You indicate where the addition should be made, using the locator code. Everyone has a viewpoint. Our viewpoints determine in part our actions. To change our actions and those of others we need to examine viewpoints. The study of philosophy helps people learn more about their own viewpoints and also about how other people view the world.
Philosophy is the viewing of viewpoints.
It is thinking about our thinking, not thinking for the sake of thinking, but thinking that helps us do a better job of making the decisions that all of us make. One assumption is that we can make better decisions if we make them consciously, rather than unconsciously. If we know what we are doing, then we can do it better. By making our thought processes explicit, we can examine the thinking behind our decisions. The divisions of philosophy correspond to the issues that are discussed.