What is Regular Expression (RegEx)?
A sequence of symbols and characters expressing a string or pattern to be searched for within a longer piece of text.
Regular expressions (RegEx) are a programmatic superpower used extensively within Google Analytics and GTM to filter data or trigger tags without writing highly repetitive rules.
For example, if you want a GTM tag to fire on your /shoes/ page, your /boots/ page, and your /socks/ page, you don't need to create three separate triggers. You can use one RegEx trigger matching the path: (shoes|boots|socks).
RegEx is prone to human error, which is why utilizing testing tools (like our Regex Tester) is highly recommended before deploying rules to production environments.
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