What is a prepared meal delivery service?

Prepared meal delivery service providers deliver ready to eat meals to customers. The meals are fully cooked and may require heating in the microwave.

Is it cost-effective to purchase prepared meals?

It is certainly not expensive to buy prepared meals; see the 30 seconds video to find out yourself. https://www.youtube.com/watch?v=Ohzv0tnhqMQ

Are the meals delivered hot, cold, or frozen?

It depends on the service provider, but SareFood.com delivers refrigerated meals which are transported in a refrigerated van from the kitchen to the customer. Almost no meals-provider provides hot food; it is either cold or frozen.