Skills
Acrobatics: (Dexterity) stay on your feet in a tricky situation or perform an acrobatic stunt.
Animal Handling: (Wisdom) Calm or train an animal, or get an animal to behave in a certain way.
Arcana: (Intelligence) Recall lore about spells, magic items, and the planes of existence.
Athletics: (Strength) Jump farther than normal, stay afloat in rough water, or break something.
Deception: (Charisma) Tell a convincing lie, or wear a disguise convincingly.
History: (Intelligence) Recall lore about historical events, people, nations, and cultures.
Insight: (Wisdom) Discern a person’s mood and intentions.
Intimidation: (Charisma) Awe or threaten someone into doing what you want.
Investigation: (Intelligence) Find obscure information in books, or deduce how something works.
Medicine: (Wisdom) Diagnose an illness, determine what killed the recently slain.
Nature: (Intelligence) Recall lore about terrain, plants, animals, and weather.
Perception: (Wisdom) Using a combination of senses, notice something that’s easy to miss.
Performance: (Charisma) Act, tell a story, perform music, or dance.
Persuasion: (Charisma) Honestly and graciously convince someone of something.
Religion: (Intelligence) Recall lore about gods, religious rituals, and holy symbols.
Sleight of Hand: (Dexterity) Pick a pocket, conceal a handheld object, or perform legerdemain
Stealth: (Dexterity) Escape notice by moving quietly and hiding behind things.
Survival: (Wisdom) Follow tracks, forage, find a trail, or avoid natural hazards.
Most ability checks involve using a skill, which represents a category of things creatures try to do with an ability check. The descriptions of the actions you take specify which skill applies if you make an ability check for that action, and many other rules note when a skill is relevant. the DM has the ultimate say on whether a skill is relevant in a situation.
If a creature is proficient in a skill, the creature applies its proficiency bonus to ability checks involving that skill. Without proficiency in a skill a creature can still make ability checks involving that skill but doesn’t add its Proficiency Bonus.
Determining Skills: A character’s starting skill proficiencies are determined at character creation, and a monster’s skill proficiencies appear in its stat block.
Skills with Different Abilities: Each skill proficiency is associated with an ability check. In some situations, the DM might allow you to apply your skill proficiency to a different ability check. For example, if a character tries to intimidate someone through a show of physical strength, the DM might ask for a Strength (intimidation) check rather than a Charisma (intimidation) check. That character would make a strength check and add their proficiency Bonus if they have intimidation proficiency.