A: It is an additional instruction. All necessary "steps"/stitches are written after the dash. You will be working the indicated slip stitches that will bring you to the necessary place to start the next round.
Q: How long does it take to make the Triangle Cowl?
A: It depends on how fast you are working. I have received a customer review that average time for making the Triangle Cowl for the first time is 5-6 hours. The next ones will take about 3 hours. However this highly depends on both: the speed you are reading the pattern and the speed of crocheting.
I hope this helped!