Answer:
quality when quality cannot be easily judged
Step-by-step explanation:
Based on the information provided in this scenario it seems that the Sheraton brand-name is likely to be used as a signal of quality when quality cannot be easily judged. Meaning that the company included the Sheraton hotel along with the list of other hotels because they do not know the quality of that specific hotel in that specific location, even though "Sheraton" is known worldwide as a luxury hotel business.