Can I move or delete the braces (e.g. {price}) and the marker which frames it?
In principle, yes. However this is not always a good idea. When you move the braces and the marker these are shown in the new position. This step is only a good idea for your own individual layout of your templates, e.g. when you wish to show illustrations in a different position. If you delete the braces and the marker (e.g. {price}), you can no longer show a price, since {price } functions as a variable parameter for a concrete value from your databank.