Currently in Google SERPs it shows a summary of content on the homepage.
Where can I configure:
I think SEOCompanion does this: http://vanillaforums.org/addon/seocompanion-plugin
If you are interested in Open Graph tags too, you might want to have a look at my plugin: http://vanillaforums.org/addon/opengraph-plugin
there are some seo plugins, or you could manually add to the template.
search SEO in addons->plugins
grep is your friend.
I found this: http://vanillaforums.org/addon/vanillaseo-plugin
Installed and looks good... But it doesn't have the option for: keywords / description (of the main site). Any other options?
OK that plugin does the trick! Thanks @HalfCat
Also installed the opengraph plugin, going to test now!