How promising is it to learn LibGDX?

Question

Java

Hello. They offered a job, and at this job it will be necessary to make games using this library. In this regard, the question arose: how promising is it to study this library? I looked at hh.ru, this word is not found anywhere there (maybe I looked badly). I heard that in addition to desktop games, this library is also used to create games for mobile phones. So how actively is this library used in programming? Interesting, of course, is business, commercial development, and not projects for oneself or a hobby.