It is similar to local resizing but steemitimages does it for you without any need to spend the time in other editors. They will send you the resized image.

Wanted to drop you a note. I just updated my semi-weekly log to use that and it's been super helpful. I also made good use of the explanation on the blank space between divs and images to fix a bug that cropped up occasionally.

This makes me really happy that the post was useful to you. I usually encounter one or two issues every time while writing a post so I started checking the content in both previewers (Steemit and Busy) to see the result, which also resulted in reporting the issues.