If you think about all the products you put on your hair, there's a lot of product build up. I personally use a lot of leave in treatments and it can feel a bit thick so I use this when I really want to purify my hair and give it a nice thorough cleanse. Plus these litre options are the bomb!
This is good for using often but my course hair sometimes needs something a little stronger to boost the mid to ends. I love Aveda products. team with a weekly treatment if you have thicker or more unhealthy hair.