With the advertising for my upcoming book launch,
I’ve collected a folder full of cover art images.
Why?
Because that folder is needed.
Every advertising venue has a different size requirement
and these sizes have to be exact
or the advertiser will be charged a penalty or worse, rejected entirely.
There is also an image quality requirement.
90 DPI (dots per inch) is the standard
for web/e-publishing
as the average screen can’t resolve higher.
Print, though, print requires a higher quality.
300 DPI is the minimum and usually standard
but the requirement can reach over 1200 DPI.
So when designing images or artwork or logos,
start at a high DPI.