I am not really a developer - I am just a regular guy with Masters degree in Applied Mathematics who really likes to improve/optimize things and has double dose of curiosity when it comes to logic problems. My main reason why I started usings Stack Overflow was because I believe that it is not possible to learn Excel (or anything like this) just from a book or a course, you need to have real-life problems to solve and I can find those here and help people at the same time.