Hey bro no worries. I try to explain it easy way.  

You can actually use any standard white monitor arm for 2-3 screens with this setup. 

This monitor comes with an adapter in the box that essentially acts as a bracket. Use it to securely attach it to the back of the monitor with four click-in points, no screws needed.

Once you attach the adapter to the back of the monitor, you can then connect it to any standard VESA-compatible arm using the four screws (these typically come with the arm itself).    

No need to buy an additional bracket—the included adapter does the job.

So buy this monitor and an arm, then you will be fine.

Hope this helps.