Diesel Core is very flexible -- you're welcome to change your keywords and Urls as often as you wish without additional fees.
To do so, simply log into the client portal and send us a message in the corresponding order.
Alternatively, chat to us online and we can update it here also.
The new Url and keywords can be completely different from the original order.
However, each order must be relevant keywords and Url's. Meaning you cannot use 2 unrelated sites (e.g. a pet store and a fitness site) within the same order. In this scenario, your best option would be two seperate orders for each site.