^start of line
\sa Unicode whitespace character
\w{1,}a Unicode word character, repeated at least once
:the literal : (5810 / 728 / 3A16)
\s+a Unicode whitespace character, repeated at least once
Non-Capturing Group(?:\w\w\s)+ +repeats the group contents below at least once:
\wa Unicode word character
\wa Unicode word character
\sa Unicode whitespace character
\s+a Unicode whitespace character, repeated at least once
\w+a Unicode word character, repeated at least once
.*any Unicode 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
i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters