You can put images in your posts a couple different ways.

You can attach the image file which shows a link at the bottom of the post.

You can past an Imgur link to the image like below to add as an attachment inline.
3ttps://imgur.com/imagecode

Or you can past a direct link to the image to display it inline.  This requires the actual file type.
3ttps://i.imgur.com/WojXMpO.jpeg