Target Audience and Who i'm doing this poster For

I put together a a spider diagram thinking about all the possible target audiences that I could aim my posters at, After all I've decided that my target audience is going to be the young working generation aged around 18-40 i feel that this target group is best suited to my project as they would recieve the message best

I did the same to narrow down 'who' I am going to design the poster for, I have decided i am going to design the posters for a humanitarian charity/Organisation.