What would you want to know if you were a stranger (case officer) looking at each photo?
Who are the people? What is their relationship to you? When was the photo taken? What was the occasion?
So 'This is a photo of me (Fred Smith, Sponsor) on the left, with my wife (Joan Smith, PA) next to me and our friends Bertha William and her husband Mike Williams second and third from the left. Taken in June 2018 on a Caribbean Cruise that we took for our honeymoon'.