Hello @SharonT9524 ,
I'd recommend following along with these articles while including the images for your emails and social posts:
Edit or replace an image in an email
Resize an image in an email for an optimal look on desktop and mobile
Best practices for designing emails for mobile
Optimal image size for Social Posts
Social media best practices and features
I'd also recommend checking out this post in our Community, which covers general display issues and other discrepancies that can occur between different email clients / apps.
... View more
