In the context of manga/novels, "hot" usually refers to "trending" or "popular" chapters. If you are following the latest release, ensure you are checking reputable scanlation sites or official apps like MangaPlus or Shonen Jump to avoid malware often found on "raw" aggregator sites.
The series (translated as The Berserker NPC Unknowingly Destroys the World or The Frenzied Warrior Mob Unknowingly Destroys the Main Story ) is an action-comedy isekai that subverts the "mob character" trope through extreme, unintended violence. Series Overview kyou senshina mob mujikaku ni honpen wo hakai suru raw hot