When you find someone else’s solution online, and determine that it solves your particular problem.
A much faster solution, then say, starting from scratch.
You copy and paste or recreate it, maybe just changing a few variable names.
Possibly leaving all the comments and notes that the original solution had.
Voila, “we” did it.
And over the long run, some of our career success is based on how proficient we are in doing so.