I would think about where your clients and potential clients are and focus on those one or two platforms. As I mentioned in the last answer, you’ll need to be as active as possible to really grow a community and connect with your audience, so if that means doubling down on one platform then that’s the best strategy for you. If you have the time and knowledge to be active on multiple platforms, test and learn what works and do more of that. Use analytics to see what content resonates, and never underestimate the benefit of speaking to your clients about social media, what they use, and what helps them decide about their travel plans.