Title with hover show image

Hello,
please can you help me?
I would like to show only the title and hover display a picture and description.
Can you show me how to do?
thank you very much

Hi
you have a demo here
www.joomlack.fr/en/joomla-extensions/tooltip-gc
with the details in "Usage of Tooltip GC"
CEd

Thank you very much for your reply.
Now I have a more serious problem: the tooltip does not work on my site.
I am trying to insert the code into a module, but it does not work.
View image
this is the link on my site: site
Can you tell me why it does not work please?

into your custom module, have you set the option to load the plugins on it ? this is the first option if you use a native custom module