Plain Text Pattern Matching

If you do not specify a Perl Compatible Regular Expression (PCRE), Gravity will use plain text patterns in filters, rules, and scoring. Plain text patterns are simple, caseless pattern matches.
About plain text matching:

·      Caseless; the pattern matches upper and lower case

·      Matches substrings within larger strings, not whole words. (except in the scoring dialog where you can specify to match a whole word only)

·      Wildcards are not supported
Many times a plain text string, rather than a PCRE, will do what you want, particularly if the phrase or word is not common.
However, for simple, small, or often-used words, you will likely get false positives. PCREs are more powerful. With PCREs you can refine patterns to include matching case, word boundaries, and much more.