What is "Not Provided" data in Keyword Reports?

Essentially, while Analytics tells you what users do once they arrive on your site, Search Console shows you how your site performs in search results. For the purposes of uncovering 'Not Provided' keywords, Search Console is actually able to provide a unique service that Analytics does not

Hi Friends,
In Google Analytics, you can see which search terms are bringing people to your website by clicking Acquisition > Campaigns > Organic Keywords – or at least you used to be able to. In 2011, Google started encrypting search data from users logged into their Google account and this is when marketers started seeing 'not provided' in their Google Analytics keyword reports.