Regular expressions (regex for short) can help speed up your use of Google Analytics as well as add extra flexibility to the way you include (or exclude) particular data and information from reports. You can think of regular expressions as a way to search for and match specific information.

They are predefined characters or a series of characters that broadly or narrowly matches and selects patterns in your digital analytics data.

Concerning to EPC 12.2, regular expressions can help users include or exclude any user information.

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