A picture has traditionally been worth a thousand words. Today, the right picture could be worth a thousand likes. Social media has gone visual in a very big way, offering travel professionals unprecedented opportunities to promote their products and brands. Photo-based social media sites such as Instagram and Pinterest, in particular, have ushered in a visual revolution, taking the old adage "don't tell when you can show" to new heights. Unlike words, photos can preserve visual memories when ours fade or fail to recount a great vacation from beginning to end. No one takes a vacation without taking photos, right? But beyond sheer memories, a really great photo can influence a purchase decision. Get the full story at Travel Weekly