.*any character (except for line terminators), repeated any number of times
Conference IDthe literal text Conference ID (case sensitive) \D*any character that's not a digit, repeated any number of times
*matches any number of characters from the set below:
0-9one character from 0 (4810) to 9 (5710)
.*any character (except for line terminators), repeated any number of times
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