It has to do with converting an image you have created or downloaded into a jpeg. I have struggled with this because I will sometimes create E book covers and then have to find a way to convert them easily to upload to sites like Kindle and Publit.
I spent some time on Google and I found the easiest way.
Save the image to your desktop.
The example I will use is a book cover I created in Inkscape, but wanted to upload to Kindle Self Publishing.
Here are the steps;
Save Image to Desktop
Right Click on the Image
Click on Open With
Save Picture as JPEG
Worked perfectly, and the picture quality stayed great!
Hope this helps some warrior out there.
Thanks for reading,