No questions in Advertising Signs
To include an image in your message first of all upload it to this Free image sharing service at Imgbb
You can then copy the image link provided and paste it in to your message for viewers to click on. They will view the image on the Imgbb website.
If you wish your image to appear in your message, you need to embed the full URL by clicking on the image icon in the message window and pasting the full URL into the URL frame.