If you were trying to add an image it doesn't seem like it worked, the way I usually do it is to use filegarden.com or catbox.moe to host images (catbox is much easier and more straightforward while filegarden is better for being able to easily view everything you've uploaded)

The dimensions are kinda optional, if you leave it blank it'll display in the post at full size, so if you wanna scale something up or down then you can put in whatever dimensions you need! ^_^