A dictionary definition of philosophy is:
The study of the fundamental nature of knowledge, reality, and existence, especially when considered as an academic discipline.
Does philosophy even matter anymore ?
In the present world where there are many people who are either agnostics or narcissistic, finding a purpose of life is very crucial. We live like Sisyphus, doing our everyday chores until we die without any proper sense of purpose.
Philosophy attempts to answer the purpose of existence. There are many philosophies you could follow. One way to be more optimistic while living in a relatively cruel world is by following the Stoic philosophy influenced mainly by Marcus Aurelius.
If you ever have watched the movie The Shawshank Redemption, its just a embodiment of Stoic philosophy. The below clip shows how.
You could even go to the other extreme end of being a Realist like below .
Hamza Yusuf mentioning why philosophy matters in below clip.
Basically studying philosophy would mean having an individual world view. Knowing the secrets of Philosophy could make you someone the world values, that is, your absence will be felt by many.