Post card saved for Chat

My client wants this postcard saved for posting on Chat. I have no idea how to go about it. I converted it to RGB 72ppi but it looks to me very unclear. Can anyone help me?

if its for whatsapp you can make a higher resolution e.g. 250 or even 300 dpi coz anyway when they add it as an image they reduce file size.

do you think that is why it was looking so unclear?

BTW its a really nice ad! I found it hanging on my door the other day!

Thank you :slight_smile: