Learning things about the world falls into the lore skills. Each of these skills has certain uses described below:
Animal lore is important to those interested in breaking an animal for riding or training an animal. In certain rare cases, a monster might be trainable but those cases would be special opportunities only available in certain circumstances.
Animal lore might also be used to try to get the most value out of herds or flocks owned by a character. In those cases, a skill check might lead to a seasonal skill challenge or minigame to overcome an obstacle that might be keeping the asset animals from reaching their full potential.
Knowledge of Atlantean artifacts is particularly important to recover and use equipment that might be useful to adventurers. Characters who have this lore may use it to identify or use a magical item recovered from ruins in the new world, or at least gain an idea for an item's use based on magical artifacts found in the old world.
This lore might also be used to try to duplicate the creation of a magic item from the Atlanteans.
A knowledge of the progression of the heavens is important for ritual magic. Once per day, a character with this lore skill who can see the nighttime sky may make a check to allow them to cast a single arcane spell as a ritual even after a failed spellcasting check blocks that spell level from being cast.
A firm grasp of geography is key to not getting lost in the wilderness, or finding one's way back to where you were before.
History is being written from scratch in the new world, but a skill for knowing the past could come in handy when crafting a treaty, following custom from another heritage, or creating an effective taunt.
A knowledge of the law in the new world is helpful for those who punish lawbreakers or those who run afoul of it. Successful checks might be used to alter wereguild costs, or change sentencing guidelines. Knowledge of the law is an important component of being a good ruler as well. Lords who have this particular lore skill may check it monthly to gain a 3% bonus to taxation pay from their land properties.
A knowledge of math is a help when dealing with vassals and lordship, as well as commanding groups of troops in the hundreds. Lords who have this particular lore skill may check it monthly to gain a 2% bonus to taxation pay from their land properties. Additionally, lords Lords who have this particular lore skill may check it monthly when paying for militia or troops to gain a 5% savings to all total upkeep costs for that period.
Forewarned is fore-armed. A successful Lore (Monsters) check might explain why certain types of attacks aren't as effective as one might think, what a certain monster eats, or why they are in a certain place. Alternately, at the GM's discretion a PC may attempt a Lore (Monsters) check to claim a mechanical benefit if they have fought and defeated the same or similar type of monster in the past. The benefit might be a bonus to damage equal to the PC's proficiency bonus, or advantage on attacks or saves against the monster's special features at the GM's discretion. In any case, the player must ask the GM for the roll, describing how they recognize the monster and how their knowledge might help them better affect it.
This lore might also be used to try to create a monstrosity just as the Atlanteans did.
A knowledge of local plant life overlaps with the Herbalism skill a bit, but still can be useful.
The spirit world is a terrifying place. Best to know some of these secrets, rather than face them uneducated.