I recently added an ad banner on my side bar.
Currently there are 5 elements on the side bar.
The 300×600 ad banner is the last element, and this ad only appears on posts and pages.
How can I make that ad banner sticky or the last widget sticky, or scrolls down together with the page?
This way the ad banner remains visible even if the user scrolls down to the bottom of the post/page.
Kindly let me know.