The curtain lowers the general light level and provides privacy by preventing people outside from seeing directly into the room.
The heading tape has the same colour as the curtain so it looks neat from the back as well.
Curtains with heading tape allow you to hang the curtain directly on the curtain rod using the rod pocket or tabs. You can also hinge the curtain onto a track rail using gliders and hooks.
Using gliders and hooks usually creates a more formal and dressed-up feel, where hardware is not visible.
The cotton/viscose blend makes the fabric soft and allows it to fall gently.