Taking a screen shot on your galaxy s6 edge is pretty simple. Whenever you have a web page pulled up on your s6 edge simply hold the power and home button simultaneously. You should here a clicking noise, and see a slow motion image of the image your saving move to the bottom of the screen. To make sure the image saved go to the gallery section on your galaxy s6 edge and you should be able to find it.
Taking a screen shot on your galaxy s6 edge can be useful if there is something you need to send to someone quickly or saving an image as a reminder for yourself. Just remember to hold the buttons simultaneously or it wont work.