As the Product Manager for Facebook Group Travel on mobile, my focus would be on creating a smooth and integrated experience for planning and sharing trips. This feature could include tools for itinerary creation, searching for group accommodations, managing travel expenses, conducting polls for decision-making, and providing a shared gallery for capturing memories. The "Itinerary Builder" would enable users to collaboratively explore, plan, and save travel routes, attractions, bars, and dining options. Meanwhile, the "Accommodation Finder" could be linked to rental platforms to help locate suitable places for the entire group to stay. To handle shared expenses, I would suggest implementing a "Group Wallet" feature, which would allow the group to monitor their shared costs, outstanding debts, and payments. To facilitate group decision-making, a "Group Poll" system could be beneficial, allowing members to vote on various trip-related choices in a democratic manner. Finally, a shared "Trip Gallery" would provide a space for the group to document and share their travel memories together.