This is a quick video to explain how to adjust the truss rod on an acoustic guitar. Acoustic guitars often have the truss rod adjustment nut on the body side. Sometimes people get confused about what directions they should use to adjust the truss rod when working from the body side of the guitar and not from the headstock side.
Most guitar players are very reluctant to use the truss rod adjustment tool that comes with their guitar. It seems that there is an unspoken rule that truss rod adjustments can only be performed by professionals with years of experience.