Search engines usually search for some strings in the HTMl source such as the <title> tag (visible in the tab of the page) and the URL itself (for example it is important to write the model name in the URL). Other important strings are the <meta> tag where one can write a brief description of the page (or website) and some keywords.
Each device page at h-node.com contains the model mane inside the <title> tag (you can see it in the tab) and inside the URL. The meta tag is not changed for each page of h-node.com, it is set for the whole website. Anyway, AFAIK, search engines also watch the HTML source, not only inside the meta tag.
In my experience the most important tags are the <title> and the URL itsel. We could ask the user to insert a meta description for each inserted device. This could help the search engine optimization of the website. The new entry could be simply named "description" or "meta description".