If you have an image that you'd like to link or place on an email editor, say in Coupon Reach, you can follow the steps below:
Upload the image to Imgbb.com
Open up or click the image after uploading
Right-click the image and click on "Copy Image address"
That would then be your Image URL / Image Address.
You can now place it on your email editor. For instance, in Coupon Reach, you can go to the email where you'd like the image to be placed. Place the text cursor on the location where you'd like the image to appear, then click the Image button.
Paste the Image URL / Image address in the URL field then click Ok.
If you find the image to be quite larger than desired, you can double-click the image and enter a small number in either the Width or Height fields. Then click Ok.