You should definitely have a FAQ/Search on your website so that your resellers as well as customers can find all the answers to the questions they have. Some of the customers check the website first before they contact the hosting provider and hence if you have an FAQ on your website, customers will be able to get the answers to their questions and may contact you if they need more information.
Tip: If you have a forum for your website, you can integrate the FAQ on your website with the forums which will increase the content on your forums and customers will also visit your forums which will help you to get more traffic
Best of luck!!