Knee Wraps. Post Injury Use or Pre Injury Addition?

What do knee wraps do, when does one start using them and are they used before or after injury?

Here are TC’s thoughts on it : Knee Wraps - Christian Thibaudeau Coaching - Forums - T Nation

Knee wraps and Knee sleeves are a tool just like belts, straps and gloves(…).

They are extremely useful for certain situations(going for PRs, over-loading sets), but can become detrimental to your progress/safety if a dependency develops.