Hi @ssipiora thanks for the suggestion. do you maybe have some suggestion of how this data could be displayed in Piwik, in a way that would be useful to you?

Yes, I have a few. The key is that the metadata helps site owners understand how groups of pages are working on their sites.

I see value at the top of the funnel helping people understand which groups of pages help bring people to the site. I also see value deeper in the funnel when tied to Goals. Being able to look at the groups of pages that led to a conversion. Yes, knowing the straight path of pages is important. But if someone has a content heavy site they could use this information to cross link pages more effectively so they could expose additional content to the user in the right place.

Example reports/Graphics:
Show a tag cloud of the metadata from the site entry pages. Below the tag cloud show a list of the terms used to generate the tag cloud in descending order based on their frequency. If a user clicked on the term, they should be presented with a list of pages where that term appears. This helps them not only see pages where the metadata exists, but potentially identify pages where they've forgotten to add the right metadata terms. It would also be good to allow the user to filter by inbound source. For example, show the difference between Google, Bing and Yahoo visitors. Paid vs. Organic, Facebook, Twitter etc. It helps a site owner segment their audience, know the differences between them and target more effectively.

The same report could also apply to goals. Show a tag cloud of the metadata from pages a visitor visited who eventually converted on a goal you'd set up.

It would also be good to be able to view geographic differences (regions or countries) in how your content is being consumed.

I've attached several text analysis visualizations. Most are variants of tag clouds. But, you might get some ideas from them.