There are chances that you might’ve received an email with a Google document. It could be a phishing attempt that has gone viral. This attack has affected about 1 million Gmail users. While Google has blocked the attack, make sure to take security check and look for suspicious app permissions.
Analytics supports regular expressions so you can create more flexible definitions for things like view filters, goals, segments, audiences, content groups, and channel groupings. In the context of Analytics, regular expressions are specific sequences of characters that broadly or narrowly match patterns in your Analytics data.