You can add it to other projects you are wishing had a little more embellishment. Make it just for fun, or use it as a Christmas tree decoration.
All the materials/abbr. translation are listed on the pattern PDF
Tips:
1) If you want to make it bigger.
If you want to make it bigger just continue the rounds with of increasing like you normally would (for every round of increasing add an extra single crochet in between the increases) and then when you get to the size you want, when you go to crocheting the shape just change the hdc into a dc, and the sc into hdc, but keep the sl st the same. That way you will always have a dip in the middle.
2) On selling this.
You have full permission to, as long as you give me credit of the pattern that you used.
3) Difficulty level.
Low, beginner. As long as you know the basic techniques you should be able to make this.

If you have any questions feel free to ask me! I’m constantly wanting to get better and more informative with my patterns.