Somebody who is specialized in providing personal assistance by performing household management or lifestyle management tasks is known as a concierge.
In context of a hotel a concierge books your cabs, arranges for various activities that you want to perform.
Availing concierge services helps you save time by not having to do routine tasks.
You can avail these services are variable prices.
In hotels, you are not expected to pay for this service, but it is always appreciated that you tip your concierge.
Here is an article which talks about the concierge business model: https://www.feedough.com/what-is-concierge-service-concierge-services-business-models/