Atmosphere Research Group travel industry analyst Henry Harteveldt called the transactional services "a logical extension" for TripAdvisor. "Since hotel rooms can sometimes be last-minute, opportunistic purchases, having a mobile-booking tool enables TripAdvisor to serve a large number of consumers," Harteveldt said. With mobile-booking capabilities, TripAdvisor is hoping to accelerate growth in annual revenue well past the $1 billion mark by jumping into the transactional market currently dominated by suppliers and online travel agencies such as its former parent, Expedia. With TripAdvisor Instant Booking, consumers can page through user reviews and, having once decided on a trip, book a reservation through participating hotel partners without leaving TripAdvisor's site. Get the full story at Travel Weekly