In some of my answers on mathematics stackexchange, I use generating functions. I often feel this is a bit awkward because many of the readers, often including the original poster, are not familiar with these objects. So in one of my recent answers, prompted by a comment by another user, I added a short list of resources for learning about GFs, as well as some information about common prerequisites and some out-and-out propaganda about why GFs are worthy of study. See this question.
So I was thinking that in future answers where I use GFs I may add a link to the previous answer, so that readers unfamiliar with GFs will have somewhere to get started. But then I began to wonder if this is the best way.
Is there a better place to park such information so it can be easily referred to in future answers and won't get lost?