Lightworks has a very narrow use case, heavily focused on cutting feature films and longform video with a very different workflow than most non-Avid NLEs.
It shines with large video asset databases, and once you get a few weeks of muscle memory behind it (or a few months if you're coming from FCP or FCPX), it's a fast tool when making lots of simple cuts. It has a well-earned reputation for cutting stuff like drama and comedy, where effects and pre-rendered sequences take a back seat to well-timed cuts between takes and fast iterative editing feedback. The node-based compositor is... unique, but I'm not sure I'm qualified to say it's an objectively easier or better workflow than AE — YMMV.
It's also capable of doing other things like handling basic A/V effects and compositing, but not as well as other NLEs or compositors. Its best output formats are behind a licensing wall, though they're still far cheaper than Adobe, Apple, or Avid, and you can do almost all your actual cutting with the free version. While it's more stable than some FOSS NLEs, it's still shakier than Avid or Premiere on well-supported hardware, with the distinct advantage that it's got native Linux support.
The weirdest part, though, was that it was supposed to have been open-sourced after EditShare acquired it, then they didn't, and they've been saying "it'll be open sourced when it's ready" for almost 4 years now.[1]
[0] https://www.lwks.com/