You can use eazyBI for Confluence to analyze Confluence search queries, as well as page creation, update, and view statistics.

I totally agree with Todd and Dave here. As a content manager, there's nothing more valuable than knowing what your users are searching for.

I must add Google Analytics is no option for us here in Europe due to data privacy regulations. 

@Sherif That's what we would do with the data: Provide better content! It's not only about suggesting search terms. Please make this happen. 

I am also interested in this functionality.  Our previous software had this feature and just like Todd Thomas said above, it was a really great way to refine/update our content to align with our user base.  Sometimes they are not good at articulating why they are struggling finding content, by see how they are searching, we can make small changes to align with how they are looking which helps with the overall user experience and drives usage up.

Hi. Maybe my workaround will be helpful with the Confluence Cloud https://community.atlassian.com/t5/Confluence-Cloud-discussions/How-to-see-users-search-phrases-in-Confluence-Cloud-in-Google/td-p/1251682

Knowing what our users are searching for would help us create and review articles for that content. Theoretically we could maybe do some trend reporting on that over time, too, so we could see when some articles are accessed (or searched) more often.

This is definitely of interest to me - as a Tech Writer and Content Manager at my organization I'm very interested in being able to track user searches. This kind of data will help me fine-tune our documentation spaces to help folks find what they need easier.

This combined with a kind of 'staleness' tracker would be of immense help to us.

User query analysis is useful for more than just synonyms. You can also use it to find out what is the natural way most users think about the concepts in your product, to guide things like documentation development, or to distinguish between known-item and topic searches.

So a raw log of search terms is useful in and of itself.

I am reopening this issue as CONF-9268 (extend Lucene search) does not encapsulate the current request (log user search queries).

Also very eager to have this functionality available for the same reasons as Stefan and Gabriel describe:

by analyzing the search queries on our Confluence-based knowledge base, you can better finetune your content, such as building up synonym rings.

I also have a question about that synonyms plugin:
I understand it allows you to specify synomyms for labels only, not for text mentioned in the pages itself. Am I correct in this?

I want to add that I would really appreciate this feature being added to Confluence. We have a large organization with lots of content to add. This would be an excellent way to determine what content people want.