For visitors performing searches on google.com while they are logged into their Google accounts, Google masks their search terms from all trackers.

For the average site, it appears this affects around 50% of all searches, so very like "[secure search]" will be your #1 search term on Clicky.

Other tracking services may call this something else, for example "(Not provided)". We chose secure search as our term of choice though.

There is no way around it. Not even Google Analytics has access to these search terms.