A tag cloud or word cloud (or weighted list in visual design) is a visual depiction of user-generated tags, or simply the word content of a site, used typically to describe the content of web sites. Tags are usually single words and are typically listed alphabetically, and the importance of a tag is shown with font size or color. Thus both finding a tag by alphabet and by popularity is possible. The tags are usually hyperlinks that lead to a collection of items that are associated with a tag. The tag cloud is very important for SEO, because every search engine will understand the importance of these word and it will follow these link the reference your website. The default Prestashop's tag cloud is very lite and not really fun. I suggest a cloud of tags (named "Tag earth") easier and more attractive to the eye of your prospective customers. Moreover it is perfectly all referencing by search engines. Also, if your client does not have Flash, the classical cloud tags appear. Nothing more beautiful that this wonderful tag earth Web 2.0! Here is a fast screencast (demonstration video) of the Tags earth : http://www.youtube.com/watch?v=IySsVhb2rG8