Idthe literal text Id (case sensitive) \W+any non-word character, repeated at least once
\d+a digit, repeated at least once
\D+any character that's not a digit, repeated at least once
groupIdthe literal text groupId (case sensitive) \W+any non-word character, repeated at least once
Group groupid(?<groupid>\w+) \w+any word character, repeated at least once
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string