Fringe as you go

I am working on a project and it is directing me to fringe as I go. I have never done this, the whole pattern is knit. Do I just end the row and pull the yarn through the stitch? Someone told me that i do not pull the yarn through becuse I will add more fringe later. WHen I did not pull it through the area was very loose. I would really appreciate some advice.
Thanks Much! :rollseyes:

Is it a scarf? Scarves that are knit lengthwise with colour changes usually just have you drop the colour and start with your next colour.

It is a traingle wrap and it is using many types of yarn.
So when you start kintting with the new yarn do you tie off the old one? :XX: