While some of the highlights (e.g. pool, pet-friendly, fitness center, etc.) seem to be pulled from GMB attributes, others are based on current listings performance (i.e. top-rated icon is displayed for hotels with high Google reviews) or on other factors, like users’ answers to Google’s listing questions (for example, “luxurious vibe” is likely to be determined that way). The number of different icons is already high, and if other listings’ are any indication Google is likely to expand them even further, but as of now I’ve been able to see the following: luxurious vibe; great dining; stylish vibe; pool; pet-friendly; fitness center; near public transit; bar; top-rated; free Wi-Fi; great breakfast; great rooms; restaurant. Get the full story at Sergey Alakov