The art of lockpicking is used to open locked doors and containers faster and with fewer broken lockpicks
If you are playing a thief type class, you should definitely spend points in the lockpicking tree. If you are not a thief, while lockpicking is not mandatory, it is still useful to spend points here to get access to more powerful and valuable treasures.
Level up lockpicking by picking locks of lock containers. Even failed attempts can increase your lockpick skill slightly.
Expert Trainer: Majhad (Khajiit Caravan)
Master Trainer: Vex (Riften)
Novice locks are much easier to pick
Note: Novice lock are pretty easy to pick as is, so getting this skill will make picking those locks almost automatic. You need this skill to unlock the rest of the tree anyway.
Apprentice locks are much easier to pick
Requires: Novice Locks, Lockpicking 25
Note: When a lock is "easier to pick" it means the arc where the lock rotates and opens is slightly wider
Adept locks are much easier to pick
Requires: Apprentice locks, Lockpicking 50
Expert locks are much easier to pick
Requires: Adept Locks, Lockpicking 75
Master locks are much easier to pick
Requires: Expert locks, Lockpicking 100
Note: Take all the above 5 perks to allow you to easily open even the toughest locks.
Able to pick locks without being noticed.
Requires: Apprentice Locks, Lockpicking 40
Note: Useful for lockpicking without being detected
Automatically gives you a copy of a picked lock's key if it has one
Requires: Quick Hands, Lockpicking 50
Note: Lets you re-open any lock you have picked before.
Find more gold in chests
Requires: Adept Locks, Lockpicking 60
Note: Take this as it will significantly increase the amount of gold you end up with if you loot a lot of chests.
50% greater chance of finding special treasure
Requires: Golden touch, Lockpicking 70
Notes: Get this skill for more chance of finding powerful weapons and armor
Pick starts close to the lock opening position
Requires: Expert Locks, Lockpicking 80
Note: Makes lockpicking even easier by giving you a hint as to where the final position is
Lockpicks never break
Requires: Locksmith, Lockpicking 100
Note: Take this to never worry about lockpicks breaking again.