To quickly evaulate the best way I can, also known as the fa/tg/uy way, Goblin Slayer could be described as well crafted, albeit slightly edgy/fetish-baity game of Dungeons & Dragons (it could really be any other TTRPG, but D&D works just fine).
On the surface, it seems edgy, but it's only as edgy as it needs to be. Occasional rape is only most prominent in early chapters, but latter half is only brutal towards goblins.
Though, of course, you should read the manga yourself.

Shit went from 0 to 100 real fuckin quick