Sessions: A session consists of a series of pageviews that a single user makes during a period of activity. The session ends after the user either closes the browser, clears cookies, or is inactive for 30 minutes.
User: An individual person browsing your website (technically, a unique browser cookie). A returning visitor is reported when someone with existing Google Analytics cookies comes back to your website.
Update Log
March 2021: Standard site pages – Headers have been optimized so each page only contains a single H1 Title Tag.
October 2020: New search tool enabled. A drop in page views is expected due to the new search tool being an on-demand experience.