Philosophy can be defined as love for wisdom, as the etymology suggests: φιλοσοφία, philosophia, 'love of wisdom'. According to Lexico.com: "The study of the fundamental nature of knowledge, reality, and existence, especially when considered as an academic discipline."
Here is a link to a solid essay outlining the importance of philosophy for people in general, which also states that philosophy is not for everyone: The importance of philosophy or "Why Should I Take Philosophy?" by Dr. Dave Yount.
Here is a link to a page outlining the different areas of philosophy: Three Areas of Philosophy
El Mundo de Sofia by 
