Give the potential buyer all the important and relevant information.
For example:
What service do you offer?
for example logo creation, coin-development, programming, translations ect ect ect. Everything that you offer and does not violate regional laws you can offer here. Please use ONLY the appropriate category.

Describe the exact service, what is included, what will be delivered. Are there any additional options? If so, are they subject to a charge? How can the customer purchase them?