The Dropdown Tags Module displays all tags in the site in a dropdown menu linked to Joomla's tag specific page. You can see the demo on the right area, there are two different instances, showing the possible uses of the module.
Optionally prepare the content with the Joomla Content Plugins.
Select a Background Image:
Select or upload an image that will automatically be inserted as an inline style for the wrapping div element.
Domains where the module content will be shown. Comma separated list of allowed domains, withouth any prefixes or postfixes. (mydomain.com,mydomain.org is OK, https://www.mydomain.com,mydomain.org/index.html is wrong