Hi, I recently started a subreddit that is related to my future major, I was wondering if it would be a good idea to put the subreddit in my college apps. Also, do you know/how any advise as to how to grow a subreddit?
Unless it becomes hugely popular or influential, I don’t think it is going to have much impact. There are thousands of these. I suspect most colleges would view it as a pastime. It’s what you enjoy doing in your free time, except it’s about a specific topic. If you are spending substantial time doing it, I guess it could be listed as an activity, but be careful of how you frame it.
As far as growing it, that’s not really an appropriate question for CC. I am sure there are better places to get advice about Reddit.