We use the word "boilerplate" a lot at work. It's such a strange phrase that seems like it's probably traveled far from its original meaning, so I looked up what that meaning was.
It goes back to newspapers. Large advertisers and content syndicates would distribute ready-to-go printing plates to local newspapers that could easily just go onto the press and be ready to print without any modification. These plates resembled rolled steel that was used to make boilers.