Not sure if this is a Meta question; definitely isn't appropriate for the main site. More like a chatroom thing I guess, but there's no one there.
ELL is a Q&A site for English language learners. I'd like to describe [to a friend] what kind of questions we answer here. What are the key topics we provide advice on?
Looking at all the tags and combining them, I could only come up with the following:
Provide learners with advice on grammar, vocabulary, reading comprehension, and writing.
Is there something I am missing? I just want to mention some of these bigger "groups/modules" [?]. For example, tags like word-request or phrase-request are covered by vocabulary. I think sentence-construction and that sort of tags are covered by writing. Meaning and its variants are covered by reading comprehension. What am I missing?