The owner of a lost dog would use a green turquoise lost dog poster to spread the word about their missing pet. They would distribute these posters in their local area in hopes that someone may have seen or found their dog. Additionally, concerned community members who spot the poster may also take action and keep an eye out for the missing dog. The poster would typically include a recent photo of the dog, its name, physical description, and contact information for the owner. Overall, the green turquoise lost dog poster serves as an important tool in the search for a lost pet.