I just installed Kazam, and it looks very simple to use. I want to use it here on askubuntu. I figured out how to take a screenshot, I just don't know how to upload it. Does anyone know how to do this?
If you're already hosting your screenshot elsewhere, you can simply link to the image using the standard markup (see 'advanced help' > 'Images'), but the internal hosting method is generally easier and safer.
First step is to find a web site to host the image.
I use imgur but there are lots of other sites.
Once the image is hosted
How do I add images to my posts?:
the editor toolbar button insert image toolbar button
Taken directly from the faq