At this point, you've definitely seen that brightly colored tape people have been wearing on their body at places like their knee or shoulder.
What is this tape? It is kinesio-tape, also called, K Tape. There are many brands of this tape on the market (KT Tape, RockTape) and the colors are just for fun!
What is K tape used for? Generally it is placed on an area of musculoskeletal dysfunction. That could be a muscle strain or a joint problem. Often, in physical therapy clinics, it is used off-label to help support a joint the way a more rigid strapping tape would, but with more freedom to move since K tape has an elasticity to it that other tape doesn't have.
There are several cited benefits of K tape used in the traditional manner. However, current evidence based research does not fully support all supposed benefits.