By following the official Google Webmasters blog and related online presentations, you can learn a great deal about the SEO in a short amount of time.
The video below is about 'snippets', that is, the presentation of your website in the search results after someone has entered a search query. Usually, the 'snippet' is the combination of the page title, description and page URL. In DotNetNuke, you can set the page title and page description in the 'page settings'.
Bottom line:
[Visit website...]
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