There are a couple of ways you can contribute to a Gemzies-page:

-You can rate every entry on any particular Gemzies-page by clicking on a "score" of 1 to 5 Gemzies for that particular entry. Every visitor can rate entries.
-You can add your personal reviews to any entry on a particular Gemzies-page.
-You can add your personal tags to an entry.
-You can comment on the reviews (or tags) of others.
-YYou can add new entries to a Gemzies-page. These entries can cover sites, videos, photos, news, and books.
-You could even start a new Gemzies-page.

You need to have an account in order to add your reviews, comment on the reviews (or tags) of others, add new entries, or create new Gemzies-pages.

Gemzies uses your contribution not only to expand existing Gemzies-pages, but also to improve the structure of a page, e.g. by improved tagging of an entry, based on your comments on tags of other contributors.