Global Online Travel Agent Market Size, Share & Demand Report By Booking Type (Air Ticketing, Hotel & Accommodation Booking, Vacation Packages, Car Rental Services, Rail & Bus Ticketing, Cruises & Ferry Booking, Travel Experiences & Activities), By Platform Type (Desktop-Based, Mobile Web, Mobile Applications), By Traveler Type (Leisure Travelers, Business Travelers, Group Travelers, Solo Travelers), By Trip Type (Domestic, International), By Pricing Model, By End User, By Region & Segment Forecasts, 2025–2030