Non-Capturing Group(?:^|\/) \/the literal / (4710 / 578 / 2F16)
\d{6}a digit, repeated exactly 6 times
\/the literal / (4710 / 578 / 2F16)
Negated Character Class[^\/]+? +?matches at least one character outside the set below:
\/the literal / (4710 / 578 / 2F16)
\s*any whitespace character, repeated any number of times
\ban ASCII word boundary
thirdthe literal text third (case sensitive) 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