I want to what is the age of users in general. I want to ask this because age determines so many things. A student of age 30 can be far better than a student of age 17. I know it’s personal information which you will not want to share but I just want a rough idea.
This information is not systematically collected anywhere, so the best that you can expect is a general impression.
There are a few users in our chat room who occasionally reveal their age, directly or indirectly: high schooler students or college undergraduates preparing for entrance exams for college or graduate school, and a couple who are partly or completely retired. But that's not a representative sample of the userbase for the site as a whole. Most of our community doesn't participate in chat.
I personally don't think that age is very important, so I spent some years aging non-monotonically. For example, I turned thirty-seven in 2013 and 2016, and thirty-nine in 2015, 2017, and 2018. (I think.) My children are of an age where birthdays and ages are a Big Deal, and they find this infuriating.