Reseller web hosting is a third party hosting process. It is the use of available hard drive space and bandwidth of an account owner in a way to host websites on behalf of other parties. The wholesale purchase of host service is made by the reseller and further they are sold to customers by generating profit.
With reseller hosting account owner purchases the services of a parent web hosting company and sell these to different clients as per their specification. These company will pay the owner and they will earn profit after paying to the web hosting company.